Question

Select a suitable adverb clause to complete the sentence:
, we had to stay back at the office.

• A. Because it was raining heavily
• B. Due to the rains
• C. Because of the rains
• D. None of the above

Answer 1

Answer: (A)

Because it was raining heavily

An adverb clause is a group of words containing a subject and a verb, and it functions as an adverb, by modifying an adjective, verb or an adverb. Adverb clauses generally begin with a subordinate conjunction (since, because, while, etc.).
Option A is correct because it is an adverb clause of reason, 'because' is a conjunction that refers to cause or reason.
Option B is incorrect because it is a phrase, not an adverb clause.
Similarly, option C is incorrect because it is a phrase, not a clause.
Option D is incorrect because the answer lies in A.