Illogical Comparison SC. Help.

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Illogical Comparison SC. Help.

by aman88 » Mon Dec 17, 2012 4:37 am
The Home School Legal Defense Association commissioned a study on the effectiveness of home-schooling compared to public and private schools.

A: the effectiveness of home-schooling compared to public and private schools
B: the effectiveness of home-schooling compared to that of public and private school education
C: the effectiveness of home-schools compared to public and private schools
D: the effectiveness of home-schools compared to that of public and private schools
E: which was more effective, home-schools or public and private schools

How to spot the correct difference between B and D? Both the options are making use of logical comparison then why is D preferred over B?

OA D

Thanks.
Source: — Sentence Correction |

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by Jim@StratusPrep » Mon Dec 17, 2012 2:41 pm
D is properly comparing the (effectiveness of the) two different schools

B is comparing home schooling (effectiveness) to (the effectiveness of) public school education

Compare apples to apples.
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