Which quotation is punctuated correctly?

"I won the school science fair last spring." announced Ben.

"I won the school science fair last spring," announced Ben.

"I won the school science fair last spring" announced Ben.

"I won the school science fair last spring, announced Ben."

The second one

Explanation:

If you look after the right after the quotation, there is a comma and if there is more to the sentence, then a comma compliments it. The sentence at the end ends with a period and that is correct. If anything if after the quotation, there should always be a comma right before the quotations marks

the first one