In which sentence does the verb "could" express criticism?

✂️ a) Christine said I could come as often as I liked.

✂️ b) You could ask before you borrow my bicycle.

✂️ c) Could you lend me ten dollars until tomorrow?

✂️ d) I could mend your bicycle for you, if that would help.

✂️ e) I could have kissed Vivian if I had wanted to.

Responda: In which sentence does the verb "could" express criticism?