The equity theory proposes that ________.
选项：

A:offering employees part of the company's shares, or equity, motivates them to do their best because their performance directly ties in with the company's
B:employees expect that exerting a given amount of effort will lead to a certain level of performance and will be demotivated if that does not happen
C:an employee compares his or her job's input–outcomes ratio with that of relevant others and then corrects any inequity
D:employees are more likely to show initiative at work if they are more involved in decisions that affect their work