which of the following is an item to be considered in bop calculations? a) a u.s. resident purchases a u.s. treasury bill. b) a u.s.-based firm manages the development of an oil field in kazakhstan. c) a u.s. consumer buys a vcr made in korea from a boston wal-mart store. d) a u.s. citizen living in minnesota travels to boston, and buys a case of labatt's canadian beer. group of answer choices a b c d