Even though all the options are related to religious art, Frederic Edwin is the only artist who was born in the United States. Michelangelo and Pietro Perugino were born in Italy during the Renaissence, when America did not exist as one nation; and Xia Gui is one of the most famous Chinese artists. Due to their origin, only Edwin fits the "American" parameter.
Colour is a essential factor for the arts as the colours add the unique and relaxation effect in a dull and boring art. Colours are used to explain the real meaning of the art or the real purpose of creating the artwork. So,I think for the uniqueness of the art colours are necessary in the arts.
