Which of the following propositions are counter to goal-setting theory?

Goal-setting theory, proposed by Edwin Locke, emphasizes the importance of setting specific and challenging goals to enhance performance. Here’s an analysis of each proposition in relation to goal-setting theory:

A. **How you attain your goal is linked to how invested you are in it**
- This aligns with goal-setting theory, which asserts that commitment to a goal can significantly influence the likelihood of achieving it.

B. **When you have specific goals, you can reach them**
- This directly supports goal-setting theory, as it suggests that specific goals enhance focus and motivation, leading to better performance.

C. **All you can do, is do the best you can**
- This proposition is more vague and may imply a lack of focus on setting specific, measurable goals. It could be interpreted as counter to goal-setting theory because it does not emphasize the importance of specific and challenging goals.

D. **Having an incentive will affect your performance**
- This aligns with goal-setting theory, as it suggests that external incentives can motivate individuals to achieve their goals.

Based on this analysis, **the proposition that is counter to goal-setting theory is**:

**C. All you can do, is do the best you can.**