Answer:
B, convert dollars to yen before leaving the USA
Step-by-step explanation:
It is always better to travel to foreign country with some of its currency. It saves time and effort abroad. Before travelling to Japan, Jack should get in contact with his local bank to see if it can exchange some U.S. dollars for Japanese yen. He should know more or less how much money he'd need in Japan, he should take the minimum to cover his expenses there and in case of an emergency. He could also exchange the currency at the airport at either point of his journey, in America before leaving or on arrival in Japan. There is also a possibility to exchange currency at banks or exchange points in Japan.