Question

multiple choice question
what is the most important reason for limiting main points?

it is hard to maintain correct wording if there are too many main points.
it is hard to have a question and answer session with too many points.
it is hard to phrase the central idea if there are too many points.
it is hard to adequately develop numerous main points in a short speech.

Explanation:

In a short - speech context, time is limited. With numerous main points, there won't be enough time to fully develop each one, making the speech less effective. The other options are not as fundamental as this one in the context of speech - making.

Answer:

It is hard to adequately develop numerous main points in a short speech.