Which of the Following BEST Answers the Question of Whether

Which of the following BEST answers the question of whether humour can be an effective way to begin an oral presentation?

A) It can be, as long as the audience hasn't heard the joke before.
B) It can be, as long as the audience will see the humour as appropriate, inoffensive and funny.
C) It can't be, because most humour puts someone down.
D) It can't be, because humour takes time better spent on giving information.