Question

why did some states require literacy tests in the past?
to limit the number of people who could vote.
to increase the number of people who could vote.
the constitution requires voters to have a high school degree.

Explanation:

Literacy tests were historically used as a discriminatory tool. In the past, some states implemented them with the intention of restricting voting rights. Minority groups, especially African - Americans, were disproportionately affected as these tests were often administered in a biased manner. The goal was not to increase voters (eliminating the option of increasing the number of voters) and the Constitution does not require a high - school degree for voting (eliminating that option).

Answer:

To limit the number of people who could vote.