Question

Fill in the blank with a suitable adverb clause:
The building was built so poorly .

• A. that a mild earthquake brought it down
• B. and everyone suffered
• C. lives were taken
• D. in the country

Answer 1

Answer: (A)

that a mild earthquake brought it down

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 result or consequence, 'so...that' is a pair of conjunctions that refers to result: "a mild earthquake brought it down".
Option B is incorrect because it is a coordinate/independent clause, whereas an adverb clause is subordinate/dependent.
Option C is incorrect because it isn't an adverb clause, the clause is in passive voice and hence there is no subject.
Option D is incorrect because it is a phrase.