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?
a.)large
b.)useful
c.)advanced
d.)efficient
i can't decide between c.) & d.)

D) Efficient

Explanation: When the sentence says the underlined word (fast) it is referring to the velocity of the microwave while heating or defrosting food, the option "D", efficient, can replace the word "fast" because it also express the idea of velocity and time. For example, a microwave that can heat something in a shorter time (faster) than another one is more efficient.

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