Final answer:
Feminist scholars mean that Option 3: the perception of age varies based on gender.
Step-by-step explanation:
When feminist scholars state that functional age is subjective for men and women, they mean that the perception of age varies based on gender.
Gender roles and social expectations can influence how men and women are perceived as they age. For example, women may face disadvantages in areas such as healthcare and social security due to societal gender roles.
Media also perpetuates negative stereotypes of elderly women. Ageism and discrimination can intersect with gender, race, class, and other factors.
So, the correct option is: Option 3: The perception of age varies based on gender.