The correct answer is D) all of the above.
Effective ways to involve and engage yout audience during a speech are the following: ask for input from the audience, use icebreakers and energizers, and break the audience into pairs and groups.
Speakers have many techniques and had useful tools to work with their audiences. A successful speaker knows that he/she needs to engage his/her audience from the very beginning of the speech, The Speaker has to communicate its ideas in a clear, succinct, and interesting way to never lose the attention of the audience.