9. Taylor is laying a floor in his 12 feet $\times 16$ feet living room. He plans to place 1 foot $\times 1$ foot tiles along the edges of the room to form a border, and then fill the rest of the floor with 2 feet $\times 2$ feet tiles. How many tiles will he use?
(A) 48
(B) 87
(C) 91
(D) 96
(E) 120
9. B.

From the problem, we know that Taylor placed
$$
12 \times 2 + 14 \times 2 = 52
$$

tiles along the perimeter. Then, there is still $10 \times 14 = 140$ square feet of space in the center of the room, which can accommodate $\frac{140}{4} = 35$ tiles.
Therefore, a total of $52 + 35 = 87$ tiles were placed.