PLEASE HELP!!!!!!!!
Rewrite the following compound statement as a biconditional.
If it rains, then I use an umbrella, and if I use an umbrella, then it is raining.
a. If I use an umbrella, then it is raining.
b. If my umbrella is broken, then it is not raining.
c. I use an umbrella, if it rains.
d. I use an umbrella if and only if it rains.