Question

Which sentence correctly forms the plural of the letter r? A. I wrote extra r's at the end of roarrr to show the sound the lion made. B. I wrote extra rs' at the end of roarrr to show the sound the lion made. C. I wrote extra rs at the end of roarrr to show the sound the lion made.

Answer 1

I would say A with the apostrophe.

Answer 2

It's a. It's the letter and the apostrophe. And you need the apostrophe.