The best answer to the question that is being asked and being presented above would be a 'tourist'. A tourist is what we typical term for a non-citizen that is legally visiting the country. This tourist could have processed with a visa or without one, depending on the arrangements between countries.
Generally speaking, a government may be able to reduce the international value of its currency by "<span>b. selling its currency in the foreign exchange market," since this "floods" the market with the currency in question, thus making it less desirable for investors. </span>
Philosophers and other thinkers had many different ideas and propositions about the possible connection between reason and the physical world. One of them is the one you've posted, however, that doesn't mean it's universally recognized or true.
The answer to this question is D