What is Snap! in the sentence Snap! I left my homework on the bus considered?

I am in high school and i have finals. I was going through my study guide and noticed that there was a question i couldn't quite understand. i decided to ask the people, the question says What is the underlined word in the sentence below called?- Snap! I left my homework on the bus! The underlined word is snapped. The options are A-pronoun B-interjection C-Conjunction D-Apostrophe... Can u help me?