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: The stratosphere contains the ozone layer, the temperatures increase as altitude increases.
 Question: When in the stratosphere, Dean can tell that the temperature is getting warmer as the altitude he is at 
 Choices: A)increases 
B)decreases
increases