What is the BEST way to combine the information in the two clauses below?

Question

Since the bananas were going bad. Georgia decided to make some banana bread.
A.
Since the bananas were going bad and Georgia decided to make some banana bread.
B.
Since the bananas were going bad; Georgia decided to make some banana bread.
C.
Since the bananas were going bad, then Georgia decided to make some banana bread.
D.
Since the bananas were going bad, Georgia decided to make some banana bread.

Answer 1

D. Since the bananas were going bad, Georgia decided to make some banana bread.