If a Researcher Performs an Experiment Where Half of the Participants

Multiple Choice

If a researcher performs an experiment where half of the participants perform a memory task in the presence of distracting noise such as a jack hammer) while the other half do not, the researcher has

A) Assigned the independent variable of memory task outcome
B) Manipulated the dependent variable of memory task outcome
C) Manipulated the independent variable of noise level
D) Assigned the dependent variable of noise level