How do you find the central idea?

by asking the speaker to repeat all main ideas after he or she is done speaking
by identifying the topic, medium, and supporting sentences
by looking at notes kept by a peer who uses highlighting
by listening carefully to pauses the speaker uses when speaking

the correct answer is : by identifying the topic, medium, and supporting sentences

The correct answer is B. By identifying the topic, medium, and supporting sentences.

Explanation:

A central idea in a text or speech refers to the main point of a text or speech, this means the main idea or thought the writer or speaker wants the audience to understand. Considering this, all the information included in a speech is aiming at explaining the audience the central idea and this central idea can be expressed explicitly or not by the speaker.

If your objective is to find what the central idea is it is necessary to identify the topic which is the situation, aspect or subject  the speech is about, this will narrow the possible central ideas to only few; also, it is necessary to pay attention to the supporting sentences which are the sentences that explain the central idea for doing this it is necessary to know which are the sub-topics in the speech or how is the speech divided by topics or ideas; and finally it is recommended to identify the mediums which are any resource use by the speaker including body language, charts, images, these will help you to know the issue in the topic that the speaker is specifically addressing and his position towards it, including the purpose of the speech.

Thus, to find a central idea the most recommended process to follow is to identify the topic, the medium and supporting sentences as these are w key elements of a text or speech that aim at supporting the main point or central ideas and by understanding the parts of the speech or text you will get the general idea of it.

what is the question that you are asking

the answer would be c   i believe thats the most reasonable answer