Professor Ramos divides his class into small groups to work on answering several questions. The group with the highest score will receive bonus points on the next test. Lana makes no effort to help her group with the work. She is engaging in:. a. cognitive dissonance.
b. conformity.
c. group polarization.
d. social loafing.

d. social loafing.

Explanation:

Social loafing is a process in which the individual makes no effort or little effort when the work is to be done in a group as comparing to do the work alone.

Since in the question it is mentioned that  Lana makes no effort for helping her group. This could be because of gaining the credit of the group and utilized it

Therefore as per the given situation, the correct option is d.

can you explain it better

the answer is d. amendments.