Which sentence contains a conjunctive adverb?

A. Neanderthals thrived alongside humans; moreover, the two species interacted.
B. Because of the rise in petty crime, a curfew will be in effect at 11:00 p.m.
C. The doctor asked the nurse for his opinion, but the nurse only shrugged at her.
D. The color blue creates a feeling of coolness, whereas yellow excites the eye.