Which of the Following Is the Best Example of the Observational

Multiple Choice

Which of the following is the best example of the observational method?

A) Chris puts a glass to the wall so that he can hear his parents argue.
B) Elaine parks her car near a traffic light and records how many drivers run red lights.
C) Gary stops people on the street to ask them how they voted in the last election.
D) Twyla videotapes her sister's wedding, focusing on sentimental and silly moments.