Which of the following is correct?

a) "excuse me, professor nubbles," the student said. "did you leave your dell™ laptop in your philosophy 301 class? "

b) "excuse me, professor nubbles," the student said. "did you leave your dell™ laptop in your philosophy 301 class? "

c)"excuse me, professor nubbles," the student said. "did you leave your dell™ laptop in your philosophy 301 class? "

d)"excuse me, professor nubbles," the student said. "did you leave your dell™ laptop in your philosophy 301 class? "

e)"excuse me, professor nubbles," the student said. "did you leave your dell™ laptop in your philosophy 301 class? "