This sentence is a simple sentence, even though it has 'and'.
Anwser is a and I’m not good at explaining but yh .
<span>The sentence written correctly looks like:
</span>Brush your teeth; rinse thoroughly when you finish.
That is because "Brush your teeth" and "<span>rinse thoroughly when you finish</span>" are both independent phrases.
They can be joined together by either a period, or a semicolon. You can also join it using a comma and a conjunction.
The correct answer is C. teeth