Task: Question Answering
Input (English): 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?  
 (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
Output (English): B