Which of the Following Is the Difference Between Anecdotal Claims

Which of the following is the difference between anecdotal claims and frequency claims?

A) Anecdotal claims involve a single variable, but frequency claims involve two variables.
B) Anecdotal claims are not based on scientific studies, but frequency claims are.
C) Anecdotal claims are less interesting than frequency claims.
D) Anecdotal claims appear in newspapers, but frequency claims appear in journals.
E) None of the above are true.