Select the sentences that is not a run-on (or fused) sentence or a comma splice:

i am on a diet, yet i keep thinking about the chocolate cake in the kitchen

i am on a diet, i keep thinking about the chocolate cake in the kitchen.

i am on a diet i keep thinking about the chocolate cake in the kitchen.

I am on a diet, yet I keep thinking about the chocolate cake in the kitchen

Explanation:

This sentence is correct because it used a comma and a conjunction (yet) to connect the two parts of the sentence. In the first, the subject is I and the verb is am. On a diet is a preposition phrase. In the second part of the sentence, I is once again the subject, but the verb is now keep thinking. Once again, the remainder of the sentence is a prepositional phrase that tells us about what the I is thinking.  

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the answer is industry