Which sentence best uses a character's speech to show that she is arrogant?
a."i don't see how i could you with this, but i am of course happy to try in whatever way i can."
b."well, i question whether anyone can stop this from happening. it is a systemic problem in our society."
c."yes, i am a harvard graduate. why do you ask? "
d. "i'm sure i can . i've always been able to use my keen wit and formidable intelligence to solve these kinds of seemingly unsolvable problems."