The _____ theory states that a person's effort in pursuing a goal is based on the value of the goal,multiplied by the person's assessment of the chances of attaining that goal.

A) auto-motive
B) expectancy-value
C) self-discrepancy
D) action identification

The given theory is called the expectancy-value theory, in which an individual's motivation to pursue a goal is determined by the values attached to that goal and the individual's assessment of the chances of achieving that goal. Hence, option B, i.e., expectancy-value theory, is the correct answer. The option A refers to a different concept called the automotivation theory. Option C refers to self-discrepancy theory, and option D refers to action identification theory, both of which are unrelated to the given concept.