Which sentence contains both an adverb and a conjunction?

A. Lawson crept silently up the stairs, but couldn't still his heartbeat.
B. Don't imagine you can't do as you wish.
C. Do you want the shrimp or the crab?
D. Lucille was a kind person, but she hated people who spread rumors.

Question

Which sentence contains both an adverb and a conjunction? 
 
     A. Lawson crept silently up the stairs, but couldn't still his heartbeat. 
B. Don't imagine you can't do as you wish. 
C. Do you want the shrimp or the crab? 
D. Lucille was a kind person, but she hated people who spread rumors.

sepeario · Answer

It's A. Silently is the adverb describing 'crept', and but is the conjunction joining the two clauses.