1. Given 3 feet $=1$ yard. If there is a rectangular field that is 12 feet long and 9 feet wide, then it requires ( ) square yards of grass to cover it completely.
(A) 12
(B) 36
(C) 108
(D) 324
(E) 972
1. A.
$$
\frac{12}{3} \times \frac{9}{3}=12 \text{.}
$$