Karen's Supervisor,while Discussing About Her Participation in a New Product

Karen's supervisor,while discussing about her participation in a new product development team,tells her that she has been engaging in social loafing.This indicates that Karen:

A) has been involved in whistle blowing activities.
B) has been discriminating against colleagues belonging to minority groups.
C) has not been putting much effort into the team's work.
D) has stolen office property.