Answer: A.
explain:
definition: a short extract from a recorded interview, chosen for its pungency or appropriateness.
a famous example of sound bites:
What are “sound bites"?
One of the most famous examples of sound bites is President John F. Kennedy's words: “Ask not what your country can do for you – ask what you can do for your country.” This quote remains memorable even after more than 50 years. Compared to the 1960s, when a standard sound bite lasted 40 seconds, it is shorter now.