The correct answer is B) the elimination of property requirements for the white men.
The statement that describes a direct cause of increased voter participation in the early nineteenth century is "the elimination of property requirements for the white men."
One of the most important reasons for the increase of voting participation in the US elections was the fact that the states eliminated the limitation of property requirements for the white men. Kentucky was the first state to do in 1792. The first US presidential election that counted with the participation of most white men was the election of 1828.
The other options of the question were A) the expansion of voting rights among African Americans. C) the popularity of the federalist party. D) the addition of new states in the Louisiana territory.