Caroline has a condition where the amount of oxygen her blood can hold is greatly reduced. this leads to a decrease in oxygen supply to her lungs. which two organ systems are primarily affected by this condition? circulatory and nervous circulatory and respiratory respiratory and reproductive immune and musculoskeletal

The correct answer is : Circulatory and respiratory.

This condition primarily affects Caroline's circulatory system. Since the main purpose of the circulatory system is to supply the rest of the body with oxygen, this condition is greatly reducing the effectiveness of the circulatory system.
The decrease in oxygen supply to the lungs causes the reduction of the respiratory system effectivness as well, since the lung cells need oxygen for their metabolic processes.