According to a study conducted by Neugarten and Weinstein in 1964, which of the following was a difference between the formal and the distant styles of grandparenting?
a. Grandparents who were over the age of 65 were more likely to display a distant style, whereas grandparents under 65 were more likely to display a formal style.
b. In the formal style, the grandparent gave child-rearing advice to his or her grandchildren, whereas in the distant style, the grandparent was careful not to give child-rearing advice to his or her grandchildren.
c. In the formal style, the grandparent performed what was considered to be a proper and prescribed role, whereas in the distant style, the grandparent was benevolent but interaction was infrequent.
d. In the formal style, the grandparent considered his or her grandchildren as a source of leisure activity, whereas in the distant style, the grandparent was unaffectionate toward his or her grandchildren.