I would say C. The numbers on the map range from 48-64, so this shows that the trees need no more than 64 inches (so not answer choice d) and no less than 48, since 48 is between 30-50, the answer is C.
Explanation: Coconut usually grows in the tropical region where the average annual rainfall is about 30-50 inches. Also, in context to the above question, Florida lies in the tropical region, providing the necessary conditions such as sufficient amount of sunlight, wind and flood resistant, also provides enough humidity for the better growth of coconut trees.
