Final answer:
Option C: Will I be able to swim at the lake?
Step-by-step explanation:
The sentence that is punctuated correctly is option C: Will I be able to swim at the lake? This sentence is punctuated correctly because it begins with a capital letter, ends with a question mark, and includes appropriate spacing between words. The other options have punctuation errors. Option A is missing a question mark, option B has multiple sentence fragments without proper punctuation, and option D lacks proper punctuation between the two sentences.
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