Sentence Correction

A new genetically engineered papaya was produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but university and United States Department of Agriculture researchers who allowed growers to sue it free of charge.
A. produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but
B. produced not by profited-motivated seed companies, the case with most genetically modified crops previously approved for commercial use, but
C. produced not by profited-motivated seed companies, as was the case with most genetically modified crops previously approved for commercial use, but by
D. not produced by profited-motivated seed companies, which was the case with most genetically modified crops previously approved for commercial use, but was produced by
E. not produced by seed companies who have been motivated by profit, the case with most genetically modified crops previously approved for commercial use, but by

This is a GMATPrep question.
I selected C because of correct meaning, correct use of as etc.
Can I have some more light on the question from Forum members.

The Jock wrote:A new genetically engineered papaya was produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but university and United States Department of Agriculture researchers who allowed growers to sue it free of charge.
A. produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but
B. produced not by profited-motivated seed companies, the case with most genetically modified crops previously approved for commercial use, but
C. produced not by profited-motivated seed companies, as was the case with most genetically modified crops previously approved for commercial use, but by
D. not produced by profited-motivated seed companies, which was the case with most genetically modified crops previously approved for commercial use, but was produced by
E. not produced by seed companies who have been motivated by profit, the case with most genetically modified crops previously approved for commercial use, but by

This is a GMATPrep question.
I selected C because of correct meaning, correct use of as etc.
Can I have some more light on the question from Forum members.

IMO C

Idiom issue

produced not by....but by - correct idiom

hence A, B, D & E are out

C is concise and correctly uses the idiom...What is the OA?

i narrowed down to C and D
i choose C because which reference in D is incorrect

another vote for "C" the use of as compared to which in D is better as comparing so...

What was the right answer???

The Jock wrote:A new genetically engineered papaya was produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but university and United States Department of Agriculture researchers who allowed growers to sue it free of charge.
A. produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but
B. produced not by profited-motivated seed companies, the case with most genetically modified crops previously approved for commercial use, but
C. produced not by profited-motivated seed companies, as was the case with most genetically modified crops previously approved for commercial use, but by
D. not produced by profited-motivated seed companies, which was the case with most genetically modified crops previously approved for commercial use, but was produced by
E. not produced by seed companies who have been motivated by profit, the case with most genetically modified crops previously approved for commercial use, but by

This is a GMATPrep question.
I selected C because of correct meaning, correct use of as etc.
Can I have some more light on the question from Forum members.

A new genetically engineered papaya was produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but university and United States Department of Agriculture researchers who allowed growers to sue it free of charge.
A. produced not by seed companies who have been motivated by profit, which was the case with most genetically modified crops previously approved for commercial use, but
B. produced not by profited-motivated seed companies, the case with most genetically modified crops previously approved for commercial use, but
C. produced not by profited-motivated seed companies, as was the case with most genetically modified crops previously approved for commercial use, but by
D. not produced by profited-motivated seed companies, which was the case with most genetically modified crops previously approved for commercial use, but was produced by
E. not produced by seed companies who have been motivated by profit, the case with most genetically modified crops previously approved for commercial use, but by

there are more erros but i think one erro is enough for us to eliminate the choice.