At age 75, martha is typical of people her age. she believes that when compared to others of the same age,

At age 75, Martha is typical of people her age. She believes that when compared to others of the same age, she is doing good/well but they have more problems and they are self-absorbed people.
It doesn't means that Martha had a perfect life, she also had problems but she compared herself to other people of her age and she realized they are more narcissistic and she is not.

Ithink the answer is b. shakeri hope im not wrong : )