Answer
A hoax can help to create social change by:
A. By drawing attention to an issue that people might not know about otherwise.
Step-by-step explanation
According to the dictionary, a hoax is something intended to deceive or defraud. Thus, getting people's attention to something they might know about otherwise can lead people to a social change because people do not really know about the subject, so they follow what the media says is the "correct way".