Grandma Grace Plants a Small Garden Each Year; Shops; Visits

Grandma Grace plants a small garden each year; shops; visits family and friends; and participates in church. What do recent studies suggest about Grandma Grace's activity?

A) This activity could increase her stress hormones and cause a decline in her immune system.
B) She will tend to be happier and stay healthier.
C) She is likely to experience ageism and disengagement.
D) Too much activity by older adults can lead to cognitive decline.