What are the units that tell you if you are sharp or flat on a tuner

Explanation:

If you are out of tune, you are either too high (sharp) or too low (flat). The unit of measurement to indicate how flat or sharp you are is called “cents.” The more out of tune you are, the larger the cents. For example, 20 cents sharp is higher (aka more out of tune) than 10 cents sharp.

i think it is d but idk