A Researcher Finds That University Students Wash Their Hands on an Average

Multiple Choice

A researcher finds that university students wash their hands on an average of three times a day.She concludes that an educational program is necessary to encourage frequent hand washing by those who wash their hands less than once a day.The researcher is probably guilty of

A) hindsight bias.
B) the "I knew it all along" phenomenon.
C) illusory correlation.
D) the naturalistic fallacy.