For a User, the Optimal Control Over His/her Interaction with the System

Multiple Choice

For a user, the optimal control over his/her interaction with the system relies on:

A) the place that the interaction happens;
B) who is supervising the user-system interaction;
C) what type of activities (e.g. automatic vs. controlled) the user is taking with the system;
D) how much time the user wants to spend on the interaction
E) what is the reward that the user will have after the interaction