26. (5%) In a statistics exam, all problems are multiple-choice with 5 possible items (5選項之單選題),e.g.,( A )( B )( C )( D )( E ). Emily knew the answers to 60% of the problems, and randomly guessed the answers for the rest of the problems. What is the percentage of her score gained from guessing? (A)8% (B) 12% (C)16% (D) 20% (E) unable to evaluate