Which of the Following Was NOT a Component of the Maastricht

Which of the following was NOT a component of the Maastricht Treaty of 1991?

A) It was formally named the European Union.
B) It called for a normalizing of labor relations between countries. (Britain did not comply.)
C) It endorsed the principle of subsidiarity, in which the EU should act only in those areas in which policy goals cannot be achieved by national governments and are more likely to be reached at the supranational level.
D) It created the single European currency, the euro.
E) It named Jean Monnet as the first president of the European Union.