Latroya, gary, and katelyn are assigned to work together in their psychology class. latroya and gary are very organized, and start working right away. katelyn decides that she doesn't have to put forth any effort because the other two will do the job well-enough. if she gets a high grade without contributing to the project, she has demonstrated the problem.

a. attributional bias
b. social facilitation
c. shifting social scripts
d. free-rider