When you brainstorm for trends to generate a topic, you
a. document your sources
b. identify trends in your writing portfolio
c. revise for word choice
d. identify new trends in music, clothing, and the media?

The correct answer is D. Identify new trends in music, clothing, and the media

Explanation:

Brainstorm is considered as a creativity technique useful for generating ideas before writing, this technique consists of creating a list of possible ideas in a group, by allowing the participants of the group to participate spontaneously. On the other hand, the term trends refer to what is popular or common in some specific time, including fashion, music, style, games, among others. Thus,   if you want to brainstorm (generate ideas in a spontaneous way) to generate a topic, you will identify and list things that are popular or trendy in terms of music, clothing, media, among others, as trends are all expressed in these aspects and brainstorming consist of generating multiple ideas so later you can select the most appropriate ones.