Studies that have compared the different types of insects in

[BTGmoderatorDC]

Studies that have compared the different types of insects in coffee plantations and tropical forests have reported either finding a similar or a greater variety in plantations.

(A) and tropical forests have reported either finding a similar or a
(B) with those of tropical forests have either reported finding a similar or
(C) with those in tropical forests have reported finding either a similar or a
(D) to tropical forests have either reported finding a similar or
(E) to those of tropical forests have reported either finding a similar or

OA C

Source: GMAT Prep

[arihantdas]

Compare with - Similar categories
Compare to - Different categories

Here its compare with

We need those to refer back to insects

We need to maintain parallelism

Hence correct answer choice is C