Answer:
B). A quote from a famous speech in the past.
Step-by-step explanation:
The opening or the introductory part of a speech plays a vital role in setting the stage for the entire speech and capture the audience's attention and interest from the beginning. Thus, the opening must be eye-catching as well as revealing enough to reflect the speaker's purpose and key ideas.
As per the question, the most effective beginning statement for a speech could be 'a relevant and contextual quotation from a famous speech' as it would not only assist in gaining the audience's attention at once and disclosing the key ideas of the speaker that he/she is going to discuss but also in establishing the credibility of the claim and speaker. The other ways could be 'asking a rhetorical question', 'a surprising statistic', etc. Thus, option B is the correct answer.