posted by Brooklyn .
Which sentence contains both an adverb and a conjunction?
A. Do you want the shrimp or the crab?
B. Don't imagine you can't do as you wish.
C. Lawson crept silently up the stairs, but couldn't still his heartbeat.
D. Lucille was a kind person, but she hated people who spread rumors.
About this question,I've thought about it long enough and I would say it has to be C because the conjunction would be "but" and the adverb would be like "how,where,when and why. Am I correct Ms.Sue?