Which of the following people may carry a white cane?

A white cane is specifically recognized as a mobility tool used by individuals who are blind or visually impaired. It serves several purposes, including helping the user navigate their environment and signaling to others that they may have vision impairment. By carrying a white cane, a blind pedestrian communicates their need for assistance or extra caution from drivers and other pedestrians, making them more visible in the community.

The other options presented do not pertain to the use of a white cane. For instance, a deaf pedestrian may not require a white cane, as their challenge does not relate to vision. Similarly, an underage pedestrian or a hearing-impaired pedestrian can navigate safely without the assistance of a white cane, since neither category necessarily denotes a need for such a mobility aid. Therefore, the answer identifies the specific demographic that utilizes the white cane as a vital tool for ensuring their safety while moving in public spaces.