They get into a fight over the spelling of vollyball so your answer would be B
I think it is the shortened way of saying it.
ABCs (it would be abc's if it was lowercase)
An apostrophe doesn't pluralize a word, an 's' does.
1. change they're to their
2. change an a
3. delete the comma after workhouse
4. add a comma after computer
5. change too to to