What Primary Advantage Does the J- K Flip- Flop Have

Multiple Choice

What primary advantage does the J- K flip- flop have over the S- R flip- flop?

A) The J- K flip- flop does not have propagation delay problems.
B) The J- K flip- flop does not have an invalid input state.
C) The J- K flip- flop is much faster.
D) The J- K flip- flop only needs one output.