What membership category could a supportive high school principal join in HOSA?

The membership category that a supportive high school principal could join in HOSA is the professional category. This category is specifically designed for individuals who are employed in the field of health care or allied health education, including educators, administrators, and other professionals who support healthcare education and HOSA's mission. By joining as a professional member, the principal can contribute to the organization's goals, support student members, and potentially integrate health-related programs and initiatives within the school.

The other options do not apply to the principal's situation. The student category is intended for high school or college students actively participating in HOSA activities. The alumni category is for individuals who were once active members of HOSA but have graduated or moved on. The honorary category typically acknowledges individuals who have made significant contributions to HOSA or health care but does not generally apply to current educational professionals like principals who are actively supporting the organization’s mission.