The type of research in which one variable is changed to see its effect is: A. correlation.
B. naturalistic observation.
C. a survey. D. an experiment.

Compare and contrast life in the capitol to life in district 12

What is wrong with they follow citation of a book with two authors

If you want to change from landscape orientation to portrait orientation, what would you do? turn the camera around. flip the camera over. turn the camera 90 degrees. turn the camera 360 degrees.