Why Do the Findings of the General Social Survey (GSS)in

Why do the findings of the General Social Survey (GSS) in Canada likely underreport the incidence of elder abuse?

A) Older people are less willing than younger people to complete surveys of a personal nature.
B) Questions on elder abuse in the GSS do not include emotional abuse.
C) Many seniors feel that there is a stigma in raising a child who mistreats them and therefore do not report abuse.
D) Older people have short term-memory lapses,making recall of abuse more difficult.