Answer:
(A) Tell a joke
Step-by-step explanation:
Not knowing the audience to which the speech is being addressed it is always better to play it safe. Telling a story or a startling statistic or even starting with a question; these are all safe options. They grab the attention of the audience regardless of their age and interests. Starting with a joke is risky as it could either reduce the impact of the speech or even offend the listeners.