A speaker says: You know, you could've finished your project if you hadn't gone to play at your friend's house.

Which of the following is the correct way to transcribe this according to our Clean Verbatim Style Guide?

A) You know, you could have finished your project if you hadn't gone to play at your friend's house.
B) You could have finished your project if you had not gone to play at your friend's house.
C) You could've finished your project if you hadn't gone to play at your friend's house.