When drive-ins were at the height of their popularity in the late 1950's, some, 4000 existed in the US, but today there are less than one-quarter that many. a、there are less than one-quarter that many b、there are fewer than one-quarter as many c、there are fewer than one-quarter of that amount d、the number is less than one-quarter the amount e、it is less than one-quarter of that amount
I think it's B. There are fewer than 1/4 as many (drive-ins exist in the US). But the answer says C, parallelling 400 with "that amount". Any thoughts?
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