B
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
The position of the liver in the circulatory system maximizes its ability to filter out harmful chemicals as soon as they enter the bloodstream. Blood travels to the liver from the

### Choices:
A. nervous system.
B. digestive system.
C. immune system.
D. excretory system.

### Answer:
