Answer:
Its D. Messenger system.
Explanation:
Just took the test and its correct!
Ray and I like bird watching, but he enjoys it more than I
The correct answer would be A because you need a comma in between the <em>A </em>and <em>S</em>
The correct answer should be D. emphasize key words
By changing the meter you change the accentuation pattern which automatically emphasizes some parts of the lines.