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: Solar power is expensive, but as demand increases technology improves and costs decrease.
 Question: Years from now, solar power will be _____ than it is today. 
 Choices: A)more expensive 
B)less expensive
Student:
less expensive