Final answer:
During World War II, a nursing student would most likely have joined the Cadet Nurse Corps, a program designed to rapidly train nurses to meet the healthcare demands of the nation and military during the war.
Step-by-step explanation:
If a student was enrolled in a nursing education program during World War II, they would most likely have joined the Cadet Nurse Corps. This program was established to ensure the country had enough nurses to take care of patients in the United States and to support the medical needs of the armed forces during the war. With other female military service options such as the Army and Navy Nurse Corps Reserves, Women's Army Auxiliary Corps, and Women Accepted for Volunteer Emergency Service, the Cadet Nurse Corps played a pivotal role in supporting the healthcare system during this tumultuous time.
The Cadet Nurse Corps was created to provide an expedited nursing education during World War II, to address the shortage of nurses. Women who were part of this program were given a shortened nursing education free of charge in exchange for their service in military or civilian hospitals during the war. This made the Cadet Nurse Corps an attractive option for nursing students at the time.
Therefore, among the options presented, the Cadet Nurse Corps stands out as the most likely group a nursing student would join during World War II.