The research approach that involves changing the level, intensity, frequency, or duration of an independent variable is

Which of the following is a consequence of an enclave economy?

A. Raw materials are sold on foreign markets with little impact on the country's economy. B. A powerful class of rich owners is built up within the country. C. Sustained economic growth occurs as a result of multiple foreign investments in the country. D. Renewal of a state's natural resources occurs.

The first signs of the Texas governor becoming a plural executive occurred when the 1845 state constitution called for the election of what two other executive officeholders?

A. lieutenant governor and secretary of state B. attorney general and commissioner of the General Land Office C. state treasurer and comptroller of public accounts D. commissioner of agriculture and commissioner of education