human
Question: The liver converts glucose to glycogen for storage. Why is this function considered a chemical change?

Choices:
A) because the conversion transforms solids to liquids
B) because the conversion allows for less glucose in the liver
C) because the conversion changes one substance to a new one
D) because the conversion changes the shape of the liver cells
gpt
The correct answer is 2: because the conversion changes one substance to a new one.