The answer is A. Hope this helps you out!!
The wrong answer is'D .I'm afraid that the mice wheels creak all night long
B. Solar power saves money for the user and makes the world a better place all around.
A is a personal opinion, C is not specific at al, D is factual, but it doesn't exactly make sense because though it helps the environment it doesn't really sustain our resources. Therefore B is the correct answer.
As I see the author uses B:indirect characterization in the excerpt due to the definition of that technique.
