【单选题】

What does Not the author tell us in part one in order to introduce his opinion?

A、

A teenage salesgirl was unable to do simple mental calculations.
B、

A class of 60 seniors at a private college were impossible to write

a short paper without misspellings.
C、

Many students I see know nothing about world history or geography.
D、

A friend.s lazy 26-year-old daughter who preferred to go to school.