Answer: c. non-negative
Step-by-step explanation:
Absolute value is used to measure distance from zero on a number line.
For example, the distance from -27 to 0 is 27 units. So we'd say |-27| = 27.
Negative distance does not make sense, which is why the result is either positive or 0. To shorten that, we use the term "non-negative" which basically means "not negative".
Side note: the term can also be written as "nonnegative" because it technically can be thought of as one word rather than two. Both terms are acceptable though.