Answer:
Option B is correct.
Step-by-step explanation:
Otero translated the phrase "three less than a number" into the expression 3 - x.
I think Otero gave a wrong expression for the phrase.
The true interpretation of the phrase is that if we assume the number as x then three less than a number means x - 3.
Therefore, Otero's expression is inaccurate. Three is being subtracted from a number, so x-3 is what he should have written. (Answer)