Which statement is logically equivalent to the conditional statement?
"If 7 is an odd number, then 7 is divisible by 2."
a) "If 7 is divisible by 2, then 7 is an odd number."
b) "If 7 is an odd number, then 7 is not divisible by 2."
c) "If 7 is not an odd number, then 7 is not divisible by 2."
d) "If 7 is not divisible by 2, then 7 is not an odd number."