Answer:
C. You have a comparative advantage in picking apples
Explanation:
Opportunity cost is the cost of next best alternative foregone while chosing am alternative.
Comparative Advantage refers to when one can do a task with less opportunity cost (other output / task sacrificed).
Opportunity cost of apples picked is the cherries sacrifised . If 'I' can pick apples at lower opportunity cost (sacrifising lesser cherries), i am more efficient in picking apples . So, I have Comparitive advantage in apple picking, than my neighbour .
There is no sufficient information about my neighbour's opportunity cost of picking cherries and his/ her comparitive advantage in that . And apple cherry trade between me & my neighbour will also be based on his / her comparitive advantage also. So that also can't be determined .
Only my comparative advantage in apples is surely determined .