What is the inverse of the following conditional statement? "If a number is a prime number, then it has no factors other than one and itself."

A. If a number is not a prime number, then it has factors other than one and itself.  

B. If a number has no factors other than one and itself, then it is a prime number.  

C. A number is a prime number if and only if it has no factors other than one and itself.  

D. If a number has factors other than one and itself, then it is not a prime number.​