One Advantage of Doing Single-Subject Memory Diary Studies Is That

Multiple Choice

One advantage of doing single-subject memory diary studies is that:

A) because the subject is also the researcher, long retention (i.e., several years) intervals can be employed.
B) because the subject is also usually a professor, the diaries are usually quite legible.
C) single-subject studies are highly generalizable to the general public.
D) because the subject is focusing on memory, his or her memory may be optimal.