(3 or more) What are some significant/illuminating moments w/explanation of its greater relevance?

This really depends on what you think is most important. Here are a few:

Blanche immediately rouses the suspicion of Stanley, who (wrongly) suspects Blanche of swindling Stella out of her inheritance.

Stanley overhears Blanche trying to convince Stella to leave Stanley because he is low class.

Stanely rapes Blanche. .

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