Who is the largest trading partner with the United States?

In order to secure participants for his study, Jason uses class rosters from instructors. Jason selects every 5th person on the instructor's class rosters for participation in his experiment. Jason is using sampling

a. simple b. snowballing c. systematic d. stratified

Which of the following helps to explain why the comprehensive constitutional reform efforts of the mid-1970s failed?

A. The delegates to the constitutional convention were ordinary citizens who did not understand the deficiencies of the Texas Constitution. B. The reform effort was predicated on the need to change provisions that were hindering economic growth, but the Texas economy took off in the 1970s under the existing constitution. C. Texas could not reform its constitution without obtaining "preclearance" from the Justice Department under the Civil Rights Act. D. Special interests fought against reform because they did not want to give up the protections that the old constitution afforded them.