Which of the following conditions qualifies a veteran for a one-time automobile purchase allowance?

The condition that qualifies a veteran for a one-time automobile purchase allowance is the loss or permanent loss of use of one or both feet. This provision exists to help veterans who have significant mobility issues, as the ability to drive can greatly enhance their independence and quality of life.

When a veteran experiences either the loss of a foot (or both) or the permanent loss of use of their feet, it directly impacts their ability to operate a standard vehicle. The automobile purchase allowance is designed to assist those veterans in acquiring a vehicle that can meet their special needs, often including modifications that accommodate their condition, such as hand controls or adaptive seating.

Other conditions mentioned may affect a veteran's health and independence but do not specifically relate to the ability to drive a standard vehicle in the context of the automobile purchase allowance. For example, temporary loss of use of one foot may not warrant the same assistance because it’s not permanent, while loss of hearing or chronic illness requiring wheelchair access does not encompass the direct necessity for vehicle modifications related to mobility. Thus, option C is the most appropriate choice given the context of the provisions for veterans' automobile purchase allowances.