9.    The concept of limited choices, as used in public choice theory, refers to the fact that: A.    Politicians may not be objective in evaluating economic policy programs. B.    Because of the importance of television and other modern communication techniques, the best and brightest candidates may not be selected by voters. C.    Voters must select a candidate who represents a "bundle" of various public policy programs and who can't register support or opposition for specific programs. D.    The most economically efficient public policy programs may not be selected because political leaders do not know enough about economics.