Which of the Following Is the Difference Between Claims Based

Which of the following is the difference between claims based on personal experience (anecdotal claims) and frequency claims?

A) Anecdotal claims involve a single variable; 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; frequency claims appear in journals.