Communicable diseases can be prevented by: a) eating healthy b) keeping a clean kitchen c) not smoking d) both a and b

B) Keeping a clean kitchen.

Communicable diseases are diseases spread by germs. Cleaning your kitchen will help prevent the spread of germs when preparing meals.

i think they came to washington to protest

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.