Which of the Following Statements Is/are Correct When Describing Expectancy

Multiple Choice

Which of the following statements is/are correct when describing expectancy theory?
i. The preference that an employee has for a particular reward is called valence.
ii. Expectancy is the likelihood of achieving the performance necessary to earn the reward.
iii. An individual's perception that the effort put into a task will lead to a specific reward outcome is fundamental to expectancy theory.

A) i and ii
B) ii and iii
C) i and iii
D) All of the given answers