Which Benefit Did the Lycophytes Derive from Their Evolution of Megaphylls

Which benefit did the lycophytes derive from their evolution of megaphylls?

A) An increased ability to capture more solar energy.
B) Increased ability to produce greater stores of food.
C) Their fitness would have increased due to a greater ability to photosynthesize.
D) All of these are benefits they would have received.
E) They would not have received any of these benefits.