Which of the following is a opinion, not fact?

a. flight attendants are responsible for the the safety, as well as the comfort of passengers.
b. flight attendants usually fly 65-90 hours a month.
c. discount air fares and free time provide flight attendants opportunities to travel.
d. working as a flight attendant is the most exciting service job in the world.

the krebs cycle and electron transport occur in the mitochondria, though other than that i would need to know more information.

word count 168

serve the people! ,” smoothly translated by julia lovell, offers an initial sample of yan lianke’s writing to an english-speaking audience. a bluntly drawn, mildly erotic fable, it teases mao zedong by poking fun at a true believer who obeys the chairman’s precepts too literally. to a western sensibility, the broad strokes of yan lianke’s humor would seem to pose little risk of inciting rebellion, whether of the flesh or of the body politic. but then, part of the book’s attraction is that it doesn’t have a western sensibility. it lets the reader see — or rather, intuit — what jokes chinese officials don’t consider funny, and how very little it takes for a writer to be branded an incendiary in 21st-century china, more than three decades after the death of mao, a decade after the death of deng xiaoping and seven years since china entered the world trade organization, a move that would seem to signal a willingness (however wary) to mingle with the rest of the world.