The correct response is:
Red stripes reflect red and absorb all other light, as does the blue square with blue; white stripes and stars reflect all wavelengths; and the flagpole absorbs all wavelengths.
This explanation correctly describes how the colors seen on the flag result from the reflection and absorption of light, while also accurately characterizing the flagpole's interaction with light. The red and blue portions of the flag reflect their respective colors and absorb the others, while the white parts reflect all wavelengths. The black flagpole absorbs all wavelengths, making it appear black.