The correct answer to this question is D, Slippery Slope. When an argument is based on unsound logic, that argument is called a fallacy. Slippery Slope is one of those fallacies. It argues that minor actions would lead one to major and not logical consequence.
An example is, "If we let the child pick a show to watch, then in the future, they will think they will be able to pick their school." It is not logical for a parent or guardian to think that if a child picks a show once that they would feel enough power to have control over their schooling.