15 points

In the 19th century, what was unique about the office of the President?

The president would serve a four-year term and be eligible for continual ... making, treaty making, receiving ambassadors, and calling Congress into special session. ... Indeed, it is safe to assert that had Washington not been available, the office might ... legislation more effectively than any other president of the 19th century

Explanation:

b.   jim crow laws were enacted in northern states.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.