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).
Q: Paragraph: Solar power is expensive, but as demand increases technology improves and costs decrease.
 Question: Mona lives in a city that doesn't know much about solar power. As the citizens become more aware of solar and the benefits it offers the demand for solar power rises. What happens to the cost of the technology as the demand increases? 
 Choices: A)increase 
B)decrease
A:
decrease