What are the units of a pyramid of energy?

A. kJ m^-2 yr^-1
B. kJ m^-1 yr^-1
C. J m^-3 s^-1
D. J m² s^-1

A

There are some complaints in the G2s about asking questions where candidates need to memorize data. I do not believe this is the case, as if a candidate understands that a pyramid of energy is showing energy per unit of surface in a period of time, the only possible answers are A and D. A candidate ought to know that the unit of time cannot be a second, so the only possible answer is A. Most candidates did have this answer right, but many were going for B.