One useful way to use online research is to get information about the sources you plan to cite.

All of the following contributed to development of motion pictures as a mass medium EXCEPT

A) exposure to light making silver nitrate turn dark. B) persistence of vision in the human eye. C) projecting images on a wall instead of showing them in a personal viewing box. D) television's ability to transmit visual images to another location.

Carlos is trying to get some of his fellow college students to join him in cleaning up the three campus parks. Each student will earn one credit hour in general studies if they volunteer

Which of the following would be a restraining force in this situation? a. Students get to work for academic credit. b. Many of the students want to see clean parks on campus. c. It will be an opportunity to work with friends. d. Students don't know where to volunteer.