Sanders, Baron, and Moore (1978) explained social facilitation by noting that a conflict occurs between paying attention to others and paying attention to the task at hand.
They named this explanation:

a) evaluation apprehension.
b) social distortion.
c) deindividuation.
d) driven by distraction.

d) driven by distraction.

Explanation:

According to the question ,concept created by Sanders, Baron and Moore on social facilitation describes about subject will experience distraction more when they are performing task with others rather than alone.They made a self report on performing task attention to measure distraction.  Therefore, driven by distraction is explanation of the concept.

Other options are incorrect because deindiviualization,social distortion and evaluation apprehension are not the explanation for concept of Baron, Sanders and Moore .Thus, the correct option is option(d).