Marietta Babysits Two Days a Week for Her School-Age Grandchildren

Marietta babysits two days a week for her school-age grandchildren, and regularly gives her neighbor, who can no longer drive, a ride to the grocery store and doctor appointments. She also frequently sends small amounts of money to her daughter, who has just returned to college. Which of the following statements about Marietta's activities is NOT true?

A) These informal activities are not measured in statistics about the volunteer work of the elderly.
B) Many elderly people provide this kind of informal volunteer assistance to others.
C) This work, like all volunteer work, is likely to increase Marietta's well-being.
D) Marietta would be better off volunteering with an organization, as to really help others, she needs more structure to her activities.