Final answer:
The sentence 'Sometimes you have to stop what you are doing.' is written in the indicative mood, making it the correct answer. The correct answer is option (C).
Step-by-step explanation:
The indicative mood in grammar is used to make factual statements or pose questions. An imperative sentence, such as an order or command, often ends with an exclamation point.
For example, 'Stop! That hurts!' is an imperative sentence expressing a demand. In contrast, when we look at an interrogative sentence, such as 'Could you please stop what you are doing?', it is asking a question rather than stating a fact. The sentence 'If I am feeling overwhelmed, I might have to stop what I am doing.' expresses a conditional mood, indicating a possibility or hypothetical situation.
Finally, the sentence 'C) Sometimes you have to stop what you are doing.' is in the indicative mood, stating a general fact or truth.