6.(3 points) If the $/ bid and ask prices are $1.2519/ and $1.2523/, respectively, the corresponding /$ bid and ask prices are a. bid = 0.7988/$, ask = 0.7985/$. b. bid = 1.2523/$, ask = 1.2519/$. c. bid = 0.7985/$, ask = 0.7988/$. d. bid = 1.2519/$, ask = 1.2523/$