None of them. Historians suggest that most pirates would have been illiterate.
Because they Arrrr (Yes I know its cheesier than my feet)
A pirate aye!
What's a pirate's favorite letter? the C!
Everyone thinks it's 'R', but his first love be the 'C'.
Because his 'I' was all jacked up.
ARRGGHH" (R) Your response = (in a pirate voice of course) "You'd think it'd be the ARRGGHH but it actually be the SEA!!! (C)
Because when you're a carpenter in the desert you can't get wood.
The A level nannies suggest leafy vegetables... But the B nannies force kale.
In a skeptic tank. (Note: I just made up this joke earlier today. I'm not 100% sure the joke is obvious feel free to suggest a better wording!)