Sentence Correction Practice Question

Sentence Correction Practice Question

 Question

The reason why the winged bean can thrive on poor soil is because their roots house bacteria that can turn atmospheric nitrogen into fertilizer.
(A) is because their roots house bacteria that can turn
(B) is because its roots house bacteria which can turn
(C) is that their roots house bacteria turning
(D) is that its roots house bacteria that can turn
(E) being that its roots house bacteria and can turn

Solution

Subject in the sentence is winged bean, which is singular.

Option A refers to winged bean as plural by using their. 
Option B us of 'which' is wrong; the use of bacteria should be restrictive. Also look out for a comma (,) before which.
Option C is meaning less it losely means that root house bacteria turns into atmospheric nitrogen, which is not the case.
Option D is correct.
Option E usage of being makes the sentence more complicated and it is not parallel, use of and requires a parallel structure.