Which idea-generating technique are you using when you write the pros of an issue in one column and the cons in another column?
A brainstorming
B. mapping
C listing
D. outlining

when you write the pros of an issue in one column and the cons in another column you are using C. Listing as an idea generating techniques.

Explanation:

Idea generating techniques are basically the tools that a person uses for their mental exercise to better generate ideas that then are deployed in the problem solving that they have at hand.

This particular problem shows the person listing out the pros and cons of a certain thing and this is a tell tale sign of the technique called listing wherein different aspects of a  topic are listed out one by one by the person attempting the exercise to generate more aides about it.

  plan: i will begin with a quotation about the importance of unity in a community. then, i will state my claim that an activity will unite our school by creating a shared vision, purpose, and direction. in the body, i will use three main points that describe the different avenues the students can take: through a variety of clubs, through a special event, or through an awareness week. i will provide evidence about other towns that have unity activities and the kinds of events that they include. pictures will illustrate my three main points in action. for the ending, i will restate the main idea in a new way and pose a question to keep the audience thinking.