Answer: B) No, it is not a biconditional
This is a regular conditional expression because it is in the form "If P, then Q"
P = Maura is going to the library
Q = she is bringing her favorite binder
A biconditional is of the form "P if and only if Q"
The "if and only if" is the key phrase needed. It allows us to swap the positions of P and Q to say "Q if and only if P".