human
Question: Students want to plant a lemon tree at their school, but the cold winter temperatures in Massachusetts would kill the tree. Which of the following is the best solution to this problem?

Choices:
A) planting several lemon trees together in a row
B) building a greenhouse to shelter the lemon tree
C) giving the lemon tree extra fertilizer in the winter
D) tying a stake to the lemon tree for support during the winter
gpt
The correct answer is 1: building a greenhouse to shelter the lemon tree.