Step 1: Understand the sentence structure.
The phrase "in case it rains" uses the present simple tense to talk about a possible event in the future, as it’s a common conditional structure. Step 2: Analyze each option.
- (A) has rain: Incorrect. "Has rain" does not fit the conditional sentence structure.
- (B) raining: Incorrect. "Raining" is the present participle, but the correct form is the simple present tense "rains."
- (C) rains: Correct. "Rains" is the simple present tense used for general future possibilities.
- (D) rained: Incorrect. "Rained" is the past tense and does not fit the context of a future possibility. Step 3: Conclusion.
The correct sentence is "Take an umbrella in case it rains."