Serbia angered Austria-Hungary when it OA) developed imperialist ambitions.
B) tried to form an independent state.
C) mobilized troops along Austria's border.
D) promised to support Germany's interests.

B

Explanation:

Serbian nationalists shot Archduke Franz Ferdinand to form a independent pan-slavic serb state. Yugoslavia.

congress also has implied powers, which derive from the necessary and proper clause of the constitution and permit congress "to make 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.