Answer the following question given this paragraph: 

The respiratory and circulatory systems work together to provide cells with the oxygen they need for cellular respiration. Cells also need glucose for cellular respiration. Glucose is a simple sugar that comes from the food we eat. To get glucose from food, digestion must occur. This process is carried out by the digestive system.


Q: Which systems work together to provide cells with the oxygen they need for cellular respiration?

 Choices:

- muscular and lymph systems

- circulatory and digestive systems

- respiratory and lymph systems

- respiratory and circulatory systems

A:
respiratory and circulatory systems
