Project a Has a Predicted Payback Period of 2

Project A has a predicted payback period of 2.5 and Project B has a predicted payback period of 5. Based on this information we can conclude:

A) Project A is preferred to Project B
B) Project B provides twice the return of Project A
C) Project B is preferred to Project A, but it is not necessarily twice as profitable
D) More information should be gathered before deciding on which project, if either, is desirable