Tracking is a self-effacing method to gain an intensive understanding of cognitive processes such as problem-solving, decision making, attention and analyzing things differently. The researcher observes the eye movements to get an insight into the ongoing mental processes. The focus of tracking is to make continuous motion that follows a target that is persistent for the given point of time.
(I’m not a professional) but I would say that D would be a possible answer because it tests and shows what they (the interviewee) is interested in. Whether it’s for the money or the easy work etc.
