All of the following sentences are complex EXCEPT

Question

A) Even though acid rain can have damaging effects, few people know much about it.
B) Acid rain has been studied as an environmental issue by the government since the 1970s.
C) Since they erode statues and corrode steel structures, the chemicals in acid rain are harmful.
D) Since the Industrial Revolution began, emissions of sulfur dioxide and nitrogen oxide have increased.

C maybe

Answer 1

And your answer is?

Answer 2

No, not C.

Answer 3

No, not A.

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Answer 4

B 100%