When drive-ins were at the height of their popularity in the late 1950's, some 4,000 existed in the United States, but today there are less than one-quarter that many.
GWD-8-Q41: B
When drive-ins were at the height of their popularity in the late 1950’s, some 4,000 existed in the United States, 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