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Which secondary effect of advertisement happens when a customer is satisfied by a product and buys it for a second time?

Today’s readers have more scientific knowledge than readers of previous eras what effect does that have on their reading of science fiction stories

Prompt: read the letter to the editor "i, too, have a dream." how does the writer use structure and language to persuade her readers and support her feelings about immigration? write an essay using evidence from the letter to answer the question.