A solar cell with dimensions of 10.0 {~cm} by 10.0 {~cm} delivers 2.00 {~A} at a maximum power output of 1.00 {~V}. What is the energy-conversion efficiency of this solar cell?
a) 20.0 %
b) 10.0 %
c) 5.00 %
d) 2.50 %