Practice question - Fish circulation

Prompt
The circulatory system of the fish is diagrammed below. Of the output from the heart, 40% is directed to the brain and 15% to each of the gills, kidneys, front and rear intestines.

(diagram - not guaranteed to be an actual fish circulatory system)

Question
What percentage of the blood from any one pump of the heart will pass through the liver?
A. 0%
B. 15%
C. 30%
D. 40%