Which One of the Following Choices Is the Best Example

Which one of the following choices is the best example of a discretionary stakeholder?

A) a manager of an organization who wants to increase production and reduce the amount of waste in raw materials
B) an investor in a company who believes that corporate decisions are reducing overall profits
C) a local community group that begins a voluntary initiative to reduce water usage in production processes
D) a customer who writes an online review stating that a business's product did not perform as expected and that they were disappointed with the purchase