Which of These Is an Example of a Demanding Stakeholder

Which of these is an example of a demanding stakeholder?

A) A manager of an organization has an idea about how to increase production and reduce the amount of waste in raw materials.
B) An investor in a company feels that the decisions being made are hindering the overall profits for the company.
C) The community in which an organization operates is beginning a voluntary initiative for all businesses and households to reduce their use of water in an effort to push environmental awareness.
D) A customer writes an online review stating that a business's product did not perform as expected and that they were disappointed with the purchase.