The visuals in a multimedia presentation should o emphasize key points and engage viewers.
O be familiar to most people in the audience.
O be unfamiliar to most people in the audience.
O make many audience members smile.

A.  emphasize key points and engage viewers.

Explanation:

It has to engage viewers to keep them interested, and if its missing its key points then your presentation is most likely a fail.

answer; ///i do believe that the correct answer is (d); ///athens had a small population;

c. mass = force / accellaration

step-by-step explanation: