What, if anything, is wrong with the following sentence.

To be fit, you should get enough sleep, exercise regularly, and eat a healthy diet.

a. Properly constructed sentence
b. Comma splice
c. Lacks parallel parts
d. Unclear pronoun

This is a properly constructed sentence. It has parallel parts, and there is no comma splice. The pronoun reference is clear.

However, in formal writing, we don't use the word "you." I assume this is not to be used in a formal paper.

To determine if there is anything wrong with the sentence, we can break it down and analyze each aspect:

1. "To be fit" - This is a phrase that introduces the main idea of the sentence and acts as a subordinate clause. It is grammatically correct.
2. "you should get enough sleep, exercise regularly, and eat a healthy diet" - These three phrases are parallel parts of a compound verb phrase. Each phrase begins with a verb ("get," "exercise," "eat") and is properly connected with commas. It is grammatically correct.
3. There is no comma splice because the sentence has appropriately used commas to separate the parallel phrases.
4. "To be fit" and "you should get enough sleep, exercise regularly, and eat a healthy diet" have a clear pronoun reference. "You" refers to the general audience or the readers.

Therefore, there is nothing wrong with the sentence. However, it is worth noting that using the word "you" in formal writing is generally avoided. However, if this sentence is intended for informal or conversational context, it is perfectly acceptable.