The answer to your question would be that the sentence that contains a misplaced modifier is the following one: They heard there was a car crash on the evening news. That is, the correct option would be A.
A misplaced modifier is a word, phrase, or clause that is improperly separated from the word it modifies or describes. Because of this separation, sentences with misplaced modifiers sound awkward, or even confusing. In this case, the PP "on the evening news" is the misplaced modifier that makes the sentence sound awkard. It shoud be placed in initial position in the sentence as an introductory phrase for the reader to understand that the phrase makes reference to the time and place in which the people heard the news (the evening news).