Teacher:You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).
Teacher: Now, understand the problem? Solve this instance: Paragraph: Air pressure is less at higher elevations.
 Question: Marcus is climbing a mountain, and notices that it is more difficult to breathe than it was before. This is likely because Marcus is at a 
 Choices: A)lower elevation 
B)higher elevation
Student:
higher elevation