Which of the Following Is a Common Objection to Utilitarianism

Which of the following is a common objection to Utilitarianism?

A) The theory requires us to compare alternative courses of action, but the outcomes of the various alternatives are often uncertain.
B) The theory concerns itself with the total amount of happiness, and not with how that happiness is distributed.
C) The theory may require that some people's happiness be sacrificed in order to achieve the greatest overall amount of happiness.
D) All of the above