Which sentence is correctly punctuated?

Question

A: Gerbils’ teeth grow continuously, therefore, gerbils need to chew daily to keep their teeth short.

B: Gerbils’ teeth grow continuously, therefore; gerbils need to chew daily to keep their teeth short.

C: Gerbils’ teeth grow continuously; therefore, gerbils need to chew daily to keep their teeth short.

Answer 1

C: Gerbils’ teeth grow continuously; therefore, gerbils need to chew daily to keep their teeth short.