Which is the converse of: If an integer is divisible by 18, then it is divisible by 9?
If it is divisible by 18, then it is divisible by 9.
If it is not divisible by 18, then it is divisible by 9.
If it is divisible by 9, then it is divisible by 18.
If it is not divisible by 9, then it is not divisible by 18.