Answer to Question 1
Answer: A
Explanation: A) If you know your readers reasonably well and your report is likely to meet with their approval, you can generally adopt an informal tone. To make your tone less formal, speak to readers in the first person, refer to them as you, and refer to yourself as I (or we if there are multiple report authors).
Answer to Question 2
Answer: C
Explanation: C) The introduction of a proposal identifies the problem you intend to solve. The introduction of the report establishes the context.