Sentence Correction

genetic makeup of corn
Source : Verbat Set 21
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While studying the genetic makeup of corn, a new class of mutant genes was discovered by Barbara McClintock, a discovery which led to greater understanding of cell differentiation.
A. a new class of mutant genes was discovered by Barbara McClintock, a discovery which led
B. a new class of mutant genes in corn were discovered by Barbara McClintock, leading
C. Barbara McClintock discovered a new class of mutant genes, and it led
D. Barbara McClintock discovered a new class of mutant genes, a discovery that led
E. Barbara McClintock, who discovered a new class of mutant genes, leading


OA D
What is wrong with C ??

As "IT" cannot refer to Barbara Mc.
IT" may refer to DISCOVERED ...right ??
Is it beacuse "IT" does not have a good referent such as DISCOVERY, we kill option C ?

Any1 Any thought(s)

IMO D

C is wrng as whether it is reffering to genes and not to discovry

in D its clear that the discovery is leading to grtr understanding

mmslf75 wrote:genetic makeup of corn
Source : Verbat Set 21
--------------------------------------------------------------------------------

While studying the genetic makeup of corn, a new class of mutant genes was discovered by Barbara McClintock, a discovery which led to greater understanding of cell differentiation.
A. a new class of mutant genes was discovered by Barbara McClintock, a discovery which led
B. a new class of mutant genes in corn were discovered by Barbara McClintock, leading
C. Barbara McClintock discovered a new class of mutant genes, and it led
D. Barbara McClintock discovered a new class of mutant genes, a discovery that led
E. Barbara McClintock, who discovered a new class of mutant genes, leading


OA D
What is wrong with C ??

As "IT" cannot refer to Barbara Mc.
IT" may refer to DISCOVERED ...right ??
Is it beacuse "IT" does not have a good referent such as DISCOVERY, we kill option C ?

Any1 Any thought(s)

it can refer to "discovery, or "new class" or "corn".. It has no clear referrant.
this issue resolved
in D.

to identify IT reference..better to ask: What is IT? and you should be able to replace the noun for IT...and the sentence should make sense.

D is correct..as discovery of what----> new class of genes

the sentence pattern of D is

main clause, noun+adjective or which clause

in this pattern, noun phrase modify entire main clause.

for example,

She is beautiful, a fact I know