Answer:
A. Be prepared to support your point of view about a controversial issue.
Explanation:
When you are writing an argument, especially if this is going to be the basis for an essay, it is important that you are prepared to support your point of view about a controversial issue. The issue is likely to be controversial because otherwise an essay would not be needed to persuade people. The best way to support your point of view is by finding objective evidence and expressing yourself in a logical way.
