Which sentence uses correct punctuation?

A. After our talk, Karen spoke of her hope: “I intend to run for student council and win.”

B. After our talk, Karen spoke of her hope: I intend to run for student council and win.

C. After our talk, “Karen spoke of her hope: I intend to run for student council and win.”

D. After our talk, Karen spoke of her hope: “I intend to run for student council and win.’