Which of the following statements about sentinel$-$controlled repetition is false?

Question $1$ options:

Sentinel$-$controlled iteration is often called indefinite iteration because the number of iterations is not known before the loop begins executing.

A sentinel value must match one acceptable input value.

Grades on a quiz are typically nonnegative integers between $0$ and $100,$ so the value $1$ is an acceptable sentinel value for grades data.

A sentinel value indicates "end of data entry."