Which of the Following Considerations About Utilitarianism Is Correct

Which of the following considerations about utilitarianism is correct?

A) The great 19th century utilitarians,Jeremy Bentham and John Stuart Mill,believed that pleasure and happiness were different things.
B) Bentham was concerned with the quantity of pleasure that an action produces,not with distinctions based on the type of the pleasure.
C) Act utilitarianism and rule utilitarianism consistently agree upon which actions are morally right.
D) Utilitarians believe that we can't compare one person's happiness with that of another.