Which of the following families tend to be matriarchal?

Identical products sold in different countries must sell for the same price in competitive markets when their price is expressed in terms of the same currency. This is called the law of _____ _____.

Fill in the blank(s) with the appropriate word(s).

The introduction of the euro by EU resulted in multifaceted advantages which include:

A) elimination of costs associated with currency conversion. B) fixed exchange rate worldwide. C) elimination of paper currency and coins. D) withdrawal of French Francs from circulation. E) a choice for using local or European currency.