Given the task definition and input, reply with output. 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).

Paragraph: Many observatories are built on high mountains. There is less air above the telescope, so there is less interference from the atmosphere.
 Question: John noted something very interesting on his trip to the mountain. When there is less air above a telescope, the interference is 
 Choices: A)More 
B)Less
Less