The correct answer is C. past tense.
Past tense is a grammatical tense used to describe an action or event that is done in the past. "Mixed" has a regular form "mix" and by adding "-ed" to it, it becomes a past tense.
6.62074139421 should be exact (calculator).
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Answer: B
Explanation:
Seasons don't have capitalizations. Spring, summer, fall, and winter should all be lowercase in a sentence except for the start of one (like this sentence). Therefore, B is the only correct sentence.