Question

which of the following is the best strategy to try if one person on a call cannot hear the other?
the person who isnt being heard should yell loudly into the phone.
the person who cant hear the other should turn off his or her microphone.
the person who cant hear should check that the volume is not muted.

Explanation:

Yelling loudly is not a proper solution and turning off the microphone of the person who can't hear won't help. Checking the volume being unmuted is a reasonable first - step to troubleshoot audio issues in a call.

Answer:

The person who can't hear should check that the volume is not muted.