Answer:
Option b is correct.
Explanation:
The statement in option ''b" is the correct option for laying emphasis on the main idea and de-emphasizing the minor ideas, that is;
"First, please make the changes to the second section of the proposal changes, and then have Jane proofread the entire proposal."
The above statement is a detailed one and shows the step by step instructions or requirements;
1." First, please make the changes to the SECOND SECTION of the proposal changes.''
The SECOND SECTION the writer mentioned lay emphasis on the second section of the proposal CHANGES AND NOT THE WHOLE.
2. "and then have Jane proofread the ENTIRE proposal"
The writer wants Jane to do the PROOFREADING of the ENTIRE proposal.