Chloride ion (Cl-) concentrations are approximately 10x higher outside of cells than inside. Imagine you discovered a novel protein that is required in liver cells for transporting Cl- out of the cell up its concentration gradient, and further found that this protein only functions if the Na /K ATPase is active. Which of the following might you reasonably conclude about the Cl- transport protein?A. It could be a Na+/Cl- symporter
B. It could be a K+/Cl- symporter
C. It could be a Cl- ATPase
D. It must be a Cl- channel