A farmer can choose to do two things with his land: 1) Plant and cultivate 200 apple trees and 100 orange trees 2) Plant and cultivate 400 apple trees and 0 orange trees The farmer's opportunity cost would be: a analyzing the climate to see what will grow better. b deciding if apples or oranges make more money. c checking to see what competitors are doing. d choosing to grow both apples and oranges or choosing to only grow apples