A
You can find the area of a trapezoid with a+b/2*h. If you do so with those numbers, you will get 108.
B
If you multiply 2.5 by 108, you can find the cost to tile the entire trapezoid. This is $270 even.
C
To solve for the area of a parallelogram, you can simply multiply bh. If you do so with these numbers, you will get 96.
D
If you multiply 3 by 96, you can find the cost to tile the entire parallelogram. This is $288 even.