HURRY! WILL MARK BRAINLIEST!
Which best identifies the adverb clause?

A. Only 1,600 covered bridges "exist in the world."

B. Covered "bridges remind us" of days gone by.

C. "If you visit Pennyslvania," take the self-guided, covered-bridge tour.

D. The Lehigh Valley, "in eastern Pennyslvania," has seven covered bridges.

The "" are the "adverb clauses"