in 2019, u.s. regulations were passed whereby passenger cruises were no longer allowed to travel to havana, cuba. this led to: an increase in the supply of the u.s. dollar in the currency exchange market for u.s. dollars to cuban pesos. no change in the supply of the u.s. dollar in the currency exchange market for u.s. dollars to cuban pesos. a decrease in the supply of the u.s. dollar in the currency exchange market for u.s. dollars to cuban pesos. restrictions on the amount of u.s. dollars that could be traded.