Mark the letter A, B, C, or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions.

a. Alex: That's great! Adopting renewable energy can help reduce pollution.
b. Lisa: I'm considering installing solar panels on my house to cut down on electricity costs.
c. Alex: Have you thought about any ways to make your home more environmentally friendly?