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).

Example input: Paragraph: Many of the worlds people live with water scarcity, and that percentage will increase as populations increase and climate changes.
 Question: John's town used to have lots of water, back when there were only a few hundred people. However, now that the town holds several thousand people, the water availability is 
 Choices: A)scarce 
B)plentiful
Example output: scarce
Example explanation: Based on the information given in the paragraph, population growth will make water more scarce, so that is the correct answer.
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 less aware of solar and the benefits it offers, the demand for solar power falls. What happens to the cost of the technology as the demand decreases? 
 Choices: A)increase 
B)decrease
A:
increase