Which of the Following Statements About the Focusing of Light

Multiple Choice

Which of the following statements about the focusing of light by the eyes is true?

A) Squids and many fishes change the shape of the lens to focus light.
B) Mammals focus light when a rigid lens is moved back and forth.
C) Mammals use muscles and ligaments to change the shape of the lens to focus light.
D) Mammalian lenses thicken when focused on distant objects.