Sonja and Jeremy performed several experiments to show the effect that changes in temperature had on the volume of an inflated balloon. They made sure the pressure stayed the same. They also showed the effects of pressure on volume if temperature stayed the same. They organized their information in this table. Experiment Volume Pressure Temperature
A Increases Stays the same Increases
B Decreases Stays the same Decreases
C Increases Decreases Stays the same
D Decreases Increases Stays the same

Which of the following statements correctly describes the set of experiments?
A. Experiments A and C have the same independent variable.
B. Experiments A and D have the same independent variable.
C. All experiments have the same controlled variable.
D. All experiments have the same dependent variable.