The sentence that contains an antecedent that is unclear, missing, or confusing, is B) During the announcements this morning, they said that football practice was cancelled.
Who does <em>they </em>refer to? There is no antecedent.
The lines that are being referred above are taken from "Romeo and Juliet" and based on these lines, how this affects the mood is by creating a mischievous mood as <span>Mercutio and Romeo banter about Romeo’s disappearance. The best answer for this would be the last option.</span>
The correct answer is B.
That is because A and C are scientific facts, while B is not. Some might consider it to be too expensive while other might not think so.