Rats Learning a Maze Are Tested After Varying Degrees of Food

Multiple Choice

Rats learning a maze are tested after varying degrees of food deprivation,to see if it affects the time it takes for them to complete the maze.Some rats are deprived of food for 4 hours before they run the maze,others for 8 hours,and others for 12 hours.In this study

A) duration of food deprivation is the independent variable.
B) the rats are a situational variable.
C) time to complete the maze is the independent variable.
D) food deprivation is the dependent variable.