Which phrase describes Charlotte Perkins Gilman’s most likely purpose for writing "The Yellow Wallpaper"?
a. to show that most women are willing to sacrifice their own happiness to make others happy
b. to show how important rest and isolation are for women recovering from a destructive mental illness
c. to show how conflicts related to parenting can affect the relationship between a husband and wife
d. to show how society’s expectations of women can limit their creativity and intellectual growth