Jillian Is Mapping Her Co-Worker's Reasoning Process

Jillian is mapping her co-worker's reasoning process. She puts a few words in brackets. What do the braces signify about the words they enclose?

A) The words are Jillian's interpretive comments.
B) The words are a counterargument Jillian thought her co-worker should have considered.
C) The words express some good ideas that the co-worker failed to include.
D) Those words clarify what the co-worker meant.
E) Those words indicate where Jillian disagreed with the point her co-worker was making.