For Ten Days in a Row Frank Felt a Static

For ten days in a row Frank felt a static electric shock when he kissed his wife while standing on the living room carpet.Now he feels mildly anxious whenever he approaches his wife to kiss her.In classical conditioning, his wife was a(n) _____ stimulus ten days ago, and has now become a(n) _____ stimulus.

A) unconditioned; conditioned
B) unconditioned; neutral
C) neutral; unconditioned
D) neutral; conditioned