Who was the first female general officer in the Marine Corps?

Margaret Brewer was indeed the first female general officer in the Marine Corps. Her promotion to the rank of brigadier general in 1978 marked a significant milestone in the history of the Marine Corps and women's roles within the military. Brewer's leadership and service helped pave the way for future generations of women in the armed forces, demonstrating that women could excel in leadership positions in traditionally male-dominated fields. Her contributions to the Marine Corps and her trailblazing role are recognized as pivotal in advancing gender equality in the military.

The other options do not qualify as the first female general officer. Betty Clark is not known for holding a general officer rank. Private Johnson does not represent a recognized figure in this context, nor is Linda McMahon associated with the Marine Corps in a general officer capacity. Brewer stands out distinctly in this regard, highlighting her importance in military history.