You are a U.S.-based treasurer with $1,000,000 to invest. The dollar-euro exchange rate is quoted as 1.50$/ and the dollar-pound exchange rate is quoted at 2.10$/. If a bank quotes you a cross rate of 1.53/, how can you make money?

a. buy at $2.10/, then buy at 1.53/, then buy $ at $1.50/.

b. buy $ at $1.50/, then buy at $2.10/, then buy at 1.53/.

c. buy at 1.53/, then buy at $1.50/, then buy $ at $2.10/.

d. buy at $1.50/, then buy at 1.53/, then buy $ at $2.10/.