The opportunity cost of catching a pound of pickerel is __ for Simon than for John, and the opportunity cost of picking a pound of cherries is __ for Simon than for John.
In an hour, Simon can catch 4 pounds of pickerel or pick 8 pounds of cherries.
In an hour, John can catch 4 pounds of pickerel or pick 20 pounds of cherries.
A. higher, higher
B. lower, higher
C. lower, lower
D. higher, lower