new york knicks star player jeremy lin is an instant hit at nba. he graduated in economics from harvard with a choice of playing professional nba for at least $5 million a year or working for $70,000 a year at a local consulting firm. he decided to play nba, but ten years later he quits basketball legend to run for us senate at $300,000 a year salary. his opportunity cost at graduation was ______ and ten years later was _______.

a)$5million;$70,000

b)$300,000;$5 million

c)$70,000;$300,000

d)$70,000;$5 million