What is the difference between a latch and a flip-flop?

a. "latch" has 4 letters, but "flip-flop" has 8 letters and a hyphen.
b. latches have a clock input but flip-flops don’t.
c. latches have a ~q output but flip-flops don’t.
d. latches can change state any number of times during a clock pulse, but flip-flops will never change state more than once per clock pulse.
e. latches will never change state more than once per clock pulse, but flip-flops can change state any number of times during a clock pulse.