To help counteract the adverse effects of trout stocking on

[BTGmoderatorDC]

To help counteract the adverse effects of trout stocking on the amphibian populations in certain mountain lakes, biologists are recommending cutting back on trout stocking on the part of some states and even their being removed from some popular fishing lakes.

(A) cutting back on trout stocking on the part of some states and even their being removed
(B) cutting back on trout stocking on the part of some states and even that they remove them
(C) that trout stocking be cut back in some states and they even remove the trout
(D) that some states cut back on trout stocking and even their being removed
(E) that some states cut back on trout stocking and even remove the trout

OA E

Source: GMAT Prep

[deloitte247]

OPTION A:- INCORRECT
Cutting back on the trout stocking on the part of come states and even their being removed- recommending needs 'that'.

OPTION B:- INCORRECT
Cutting back on trout on the part of some states and even that they removed them. This option is the same as option A above.

OPTION C:- INCORRECT
That trout stocking to be cut back in some states *the have been removed*. Here, the verb tense is issue ; Because the two actions are taken as similar/equivalent, they should be in the same form (e.g biologists are recommending x and even removing some trout.....")
"Are recommending" is present tense....It's going on now. "They even remove" is an indicative-tense, "that's just what happens" verb, so logically it doesn't make sense, either. Remember, the purpose of the sentence is to talk about current events happening in trout stocking.

OPTION D:- INCORRECT
That some states cut back on trout stocking and even their being removed there is a total poor usage of 'their and being' it is very obvious.

OPTION E:- CORRECT
That some states cut back on trout stocking and even remove the trout well constructed and satisfying