Xin would like to be promoted to shift supervisor, but he knows that, without a college degree, he won't even be considered as a candidate. As a result, he sometimes slacks in his performance, knowing that a promotion isn't a possibility. Xin's lack of motivation could BEST be described by which theory of motivation? Question content area bottom Part 1 A. Maslow's hierarchy of needs B. Acquired needs theory C. Equity theory D. Expectancy theory E. Two-factor theory