Which sentence contains an example of dialect? (treasure island)

a.
"he's the cook; and the ringleader, too."

b.
"but, look here … here's what i want to know, barbeque: how long are we a-going to stand off and on like a blessed bumboat? "

c.
"you've broken your trust; you've lived in sin and lies and blood; there's a man you killed lying at your feet this moment; and you ask me why! "

d.
"hunter, joyce, and redruth were taken into our confidence, and received the news with less surprise and a better spirit than we had looked for."