You and Your Friends Go to See a Speaker on Campus,Dr.Darian,an

You and your friends go to see a speaker on campus,Dr.Darian,an "expert" on getting into graduate school.Which of the following should make you less skeptical about his advice?

A) His recommendations are based on techniques that have worked for his students.
B) His recommendations are based on the techniques that helped him get into graduate school.
C) His recommendations are based on research he conducted for his dissertation.
D) His recommendations are similar to what you knew before you came to the talk.
E) None of the above should make you less skeptical of his advice.