How are Roy Lichtenstein Andy Warhol and Robert Indiana similar

I'm working on an assignment that has to do with digital art and this is my masterpiece that i've worked on. i was wondering if anyone knew any websites that i could possibly sell my digital artwork? i'd be very appreciated and will gladly mark the right website that does sell digital art as well brainliest! you!

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Shana does not have good study habits because she writes down every single grade she earns on a test or assignment. select the best answer from the choices provided t f