According to paragraph 3, why does the author tell the story of Bill Gates dropping out of college?
A. To imply that a Harvard’s drop-out is not the same as a normal or local university’s drop-out.
B. To testify the brilliance and innovation of Microsoft’s co-founder against the hardship.
C. To encourage graduates to work and experience life first before going to college.
D. To illustrate that grades and certificates does not always translate into a person’s future potential.