Answer:
B) He claims that cloned pets actually are just the same as the original pets from which they are cloned. :
The correct answer would be a. "Laughing and talking" is not a way to start a sentence.
A run-on is a sentence that is too long, and either has no, or incorrect punctuation. So, that wouldn't be it.
A comma splice is a sentence that has a uneeded comma. This, has none.
Therefore, the answer would be a.