Researchers in E-Commerce Design an Experiment to Determine What Factors

Researchers in e-commerce design an experiment to determine what factors are most important to online consumers when completing a transaction via the Internet.Individuals
Perform tasks on a set of Web sites and record their impressions about various attributes.
Which of the following would best describe the cases?

A) Participants
B) Respondents
C) Experimental Units
D) Identifiers