What are the two factors that determine the level at which a disease is contagious

sneezing and coughing (sorry if this is not what you're looking for)

Explanation:

answer; (d) braking faster then cars;

delegated (sometimes called enumerated or expressed) powers are specifically granted to the federal government in article i, section 8 of the constitution. this includes the power to coin money, to regulate commerce, to declare war, to raise and maintain armed forces, and to establish a post office.