I would have to say D. the main idea supported by more specific evidence
Willy never shows up onstage, but he plays a significant role in the Youngers' story. And by "significant," we mean, "very, very negative." After convincing Walter that investing in the liquor store is a great idea, Willy takes Walter's money and runs. It is because of the thieving Willy Harris that Walter's dream is deferred. Hope this will help you a lot.☺
