"Acquisition" is the subject, which is singular. The verb "is" is alright.
There is split in the answer choices between as and is.
The answers that include as are incorrect. X indicates Y as Z and X is indicative of Y as Z are incorrect idioms. The correct idioms are:
X indicates that Y is Z
X is indicative of Y (no Z)
X indicates that Y is Z is preferable because it's more direct.
Eliminate A, B and E.
In C, the pronoun it is ambiguous.
The correct answer is D.
There is split in the answer choices between as and is.
The answers that include as are incorrect. X indicates Y as Z and X is indicative of Y as Z are incorrect idioms. The correct idioms are:
X indicates that Y is Z
X is indicative of Y (no Z)
X indicates that Y is Z is preferable because it's more direct.
Eliminate A, B and E.
In C, the pronoun it is ambiguous.
The correct answer is D.










