In the Pepsi Challenge, the colas the participants drank were the dependent variable

For his senior thesis, Jacob is studying the development of motor coordination in monkeys from birth to old age, but only has one semester to collect his data. What kind of descriptive research design should he use?

a. longitudinal b. experimental c. cross sectional d. historical

Which of the following may be a potential limit on the future role of the media in Mexican politics?

a. The number of newspapers and news magazines is declining. b. Many citizens lack access to global television networks. c. Mexico's media outlets are increasingly coming under the control of the national government. d. Violence and intimidation of reporters by drug cartels has limited the ability of the media to report on a key issue. e. The circulation of newspapers is declining.