Answer:
The author's primary purpose for writing this letter is to persuade the student council to approve a solar energy program for the school. This can be inferred from the fact that the author is advocating for the implementation of solar panels on the school roof and presenting reasons why it would be beneficial. The author is not explaining her true position or discussing new technology for solar panels, nor is she arguing against the idea of installing solar panels. Therefore, option A, to persuade the student council to approve a solar energy program for the school, best aligns with the author's primary purpose.
Step-by-step explanation: