Which method can assist in clearing the ears during a rapid descent?

Clearing the ears during a rapid descent is crucial because changes in altitude can cause discomfort due to differences in pressure between the outer ear and the middle ear. Both yawning and swallowing are effective methods for equalizing ear pressure.

Yawning helps to open the Eustachian tubes, which connects the back of the throat to the middle ear, allowing air to flow and equalize pressure. This action can help relieve discomfort caused by pressure changes.

Swallowing serves a similar purpose; it activates the muscles around the Eustachian tubes, promoting their opening and facilitating pressure equalization.

Since both yawning and swallowing are effective methods for clearing the ears, the choice indicating "all of the above" is appropriate as it recognizes the efficacy of multiple techniques for managing ear pressure during rapid changes in altitude.