Digital information is stored using a series of ones and zeros. Computers are digital machines because they can only read information as on or off-1 or 0. This method of computation is known as the
system

Your answer is true : )

Iwould go with write exactly two extra paragraphs to point out additional information. but the keyword "exactly" throws me off. leads me to believe it's d. go with your gut feeling. either "write exactly two extra paragraphs" or "none of these".