Answer:
a. 4000
Explanation:
Let the new currency be represented by a variable "XD"
Using the U.S /foreign currency exchange rate, find the cost of the same basket in XD;
If 1 USD = 2XD
then 2,000 USD = 2,000*2
= 4,000 XD
Therefore, if you were to buy the same basket of goods in the foreign currency, you will spend 4,000 units. This makes choice A correct