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: Many observatories are built on high mountains. There is less air above the telescope, so there is less interference from the atmosphere.
 Question: Carter is at sea level and looks through a telescope. There is a lot of interference from the atmosphere, so Carter knows that above the telescope, there is _____ air than up on a mountain. 
 Choices: A)less 
B)more
Student:
more