Ludwig and Geller (1997, 2000) Conducted a Study Examining Goal

Ludwig and Geller (1997, 2000) conducted a study examining goal setting and safety behaviors of pizza delivery drivers. Which statement BEST describes their findings?

A) The drivers exhibited safer behaviors only if they helped to set their own goal.
B) The drivers exhibited safer behaviors only if they were assigned a goal.
C) Drivers who were either assigned a goal or set one themselves were safer than drivers who did not set goals.
D) All drivers immediately improved their safety behaviors at the beginning of training, but they immediately stopped engaging in safety behaviors when they believed the researchers weren't observing them.