Which of the following is a modifiable risk for lung cancer?  

A major difference between the Knights of Labor and the American Federation of Labor was:

In addition to economic motivations, the factor that contributed most to U.S. expansion overseas in the 1890s was:

An American force commanded by George A. Custer was overwhelmed during the:

In the late 19th and early 20th centuries, the increase in ethnic diversity in the United States because of immigration contributed to:

The purpose of the Open Door policy proposed by the United States in 1899 was to:

The Gilded Age can be described as

In the Gospel of Wealth, Andrew Carnegie expressed his belief that it was the responsibility of the rich to engage in philanthropy by:

“The Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several States, and without regard to any census or enumeration.”

The first United States president to be impeached in the House of Representatives was: