How did early settlers of North America change the environment to make it easier to travel and trade goods? A. They built a vast network of rail lines.
B. They carved tunnels to pass through mountains.
C. They cleared trees to build roads.
D. They dammed streams to create reservoirs.

D. They dammed streams to create reservoirs

Explanation:

Lewis and Clark (first inhabitants) did it

Columbus did it

Sacajewya did it

a.

Explanation:

i honesty don't know, good luck tho dawg

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.