Read the sentence. The advertisement suggests that other brands of microwaves are not as fast or cost effective. Which is the most accurate and precise replacement for the underlined word?

“Cost effective” means providing good results for the money spent, while “fast” refers to how quickly a microwave works. “Efficient” most accurately combines these ideas, describing a microwave that works quickly without wasting time or resources. “Large,” “useful,” and “advanced” do not specifically express both speed and cost effectiveness.

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