In an Experiment, Researchers Exposed Half the Children to 2

Multiple Choice

In an experiment, researchers exposed half the children to 2 hours of violence on television every day for a month and made sure the other half saw no violence on television at all. At the end of the month, they measured the level of aggressiveness in the children. What is(are) the independent variable(s) ?

A) level of aggressiveness at the end of the month
B) amount of violence watched on television
C) level of aggressiveness at the end of the month and amount of violence watched on television
D) the children