Read the four notes Tyler took while doing his research on solar panels:

1. Solar energy is affordable because sunshine is free.
2. Solar panels produced in China cost consumers about 15% less than those made in America.
3. Just as the cost of solar panels keeps going down, so does the cost of installing them.
4. Traditional utility companies see solar energy as a growing threat to their ability to do business.

Choose the two notes that are both relevant to the idea that solar panels have recently decreased in price.

A. Solar energy is affordable because sunshine is free. Solar panels produced in China cost consumers about 15% less than those made in America.

B. Solar panels produced in China cost consumers about 15% less than those made in America. Just as the cost of solar panels keeps going down, so does the cost of installing them.

C. Just as the cost of solar panels keeps going down, so does the cost of installing them. Traditional utility companies see solar energy as a growing threat to their ability to do business.

D. Solar energy is affordable because sunshine is free. Traditional utility companies see solar energy as a growing threat to their ability to do business.