C is a rhombus because the shape is a parallelogram with all equal sides. And if the sides are all equal in a parallelogram then it is a rhombus.
D is also a rhombus because the shape is a square with equal sides and with right angles. Furthermore, a square is always a rhombus because of the sides and the right angle.
In the days of the typewriter, a double-spaced page with 1-inch margins would hold an average of 250 words. So you could assume that since 4 pages<span> = </span>1000<span> words</span>