Which individual cannot carry a white cane while walking on public street or highway?

The correct answer highlights that a person who is not disabled cannot carry a white cane while walking on public streets or highways. The white cane is primarily a mobility tool used by individuals who are visually impaired or blind to navigate their environment safely. It serves to signal to others that the person using it may need assistance due to their visual impairment.

In contrast, individuals who are blind, partially blind, or disabled often carry a white cane as a means of enhancing their mobility and informing others of their condition. Since the purpose of the white cane is specifically tailored to help those with visual impairments or disabilities, it would be inappropriate and potentially misleading for someone who does not have these disabilities to carry one. This ensures that the cane maintains its significance as a symbol of need for support in navigating public spaces.