Select the most appropriate option that can substitute the underlined words in the sentence.
The interdisciplinary approach utilised in this study facilitates comprehensive understanding of the complex phenomenon under investigation.

Correct option is D

The best substitute is “facilitated a comprehensive understanding.”

Tense consistency: The participial clause “utilised in this study” implies the study is completed. Using past simple “facilitated” aligns the main clause with that past context.

Meaning preserved: The sentence still says the approach helped achieve understanding (no change in intended sense).

Natural phrasing: “a comprehensive understanding” is idiomatic when referring to a particular achieved understanding in a specific study.

Why the others are not appropriate:

A. “is facilitates a …” — ungrammatical (double verb: is + facilitates).

B. “will have facilitated …” — future perfect; mismatched with a completed past study and needlessly complex.

C. “utilises a comprehensive understanding” — changes the meaning (now the approach uses understanding rather than enabling it), which is not intended.