Answer:
The correct answer is b. When japanese tourists shop in New York.
Step-by-step explanation:
If an American citizen buys Japanese yens he is creating demand for Yens.
When japanese tourists go to shop in New York, they will need US dollars to make payments. They need to exchange their Japanese yens for US dollars.
The purchase of beef from Japan needs to be paid in Yens, so it will create demand for Yens.
So they will supply Yens and generate a demand for US dollars.
Thus, the correct answer is option B.