A poll which indicates that 20 percent of respondents approve of the U. S. military assisting in issues of regional violence in Africa, that 17 percent disapprove, and that a majority do not know enough to answer exemplifies a(n)___.

Non-opinion

Explanation:

A poll which indicates that 20 percent of respondents approve of the U.S. military assisting in issues of regional violence in Africa, that 17 percent disapprove, and that a majority do not know enough to answer exemplifies a(n)  non opinion is the lack of an opinion on an issue or policy among the majority.