Answer:
d. social loafing.
Step-by-step 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.