Which of the actions was a violation of the Treaty of Versailles? a.
Japan attacked China
b.
Germany annexed Austria
c.
Germany attacked Poland
d.
all of the above

es l lerat a por que era un tradtado con acin yaa con japon y japon los traicionohExplanation:

c is the correct answer for this question.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.