The President of the U. S. has no constitutional responsibility to * a. make treaties.
b. act as Commander-in-Chief
c. appoint judges to the Supreme Court.
d. act as head of a political party.

both include an amendment process.

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.