Which phrase best describes what this graph demonstrates?

This graph shows that chlorophyll a absorbs light with wavelengths between 60 nm and 70 nm.

This graph shows that both chlorophyll a and chlorophyll b absorb some higher energy light, as well as some lower energy light.

This graph shows how the color of leaves changes as the concentrations of chlorophyll a and b change.

This graph shows how the rate of photosynthesis changes over the course of the day.