Which Kentucky politician devised the American System?

Explanation:

Over the course of two legislative days, Speaker Henry Clay of Kentucky addressed the House from the well to support targeted protective tariffs and to proclaim his ideal of an “American system” of national development that would benefit all sections of the United States.

a.   it resulted in widespread unemployment.

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.