Let \( x \) be the number that is multiplied by 88. According to the problem, we have the inequality:
\[ 0 < 88x < 88 \]
To solve the inequality \( 88x < 88 \), we divide both sides by 88 (noting that since 88 is positive, the direction of the inequality remains unchanged):
\[ x < 1 \]
Next, we need to find the condition for \( 88x > 0 \), which simplifies to:
\[ x > 0 \]
Combining these two results, we have:
\[ 0 < x < 1 \]
This means that the number \( x \) must be a positive number that is less than 1, which corresponds to option D:
D. a number between zero and one.