Answer: A - Participants in the friend condition didn't want to insult their friends by taking too much credit or assigning too much blame. Participants in the stranger condition, however, felt no such need to temper their ratings.
Explanation: The main results are that participants take less credit for success and assign less blame for failure when working with a friendthan with a stranger. It's possible that the existing relationship makes people more reluctant to rate their partners negatively.