$5.\_\_\_\_\_\_\_.$ Which of the following might be lawful to use in a corporate marketing campaign?

A$.$ An image of a celebrity without his$/$her consent.

B$.$ A famous slogan that is already associated with a celebrity in the minds of the public without consent from the celebrity.

C$.$ A publicity photo of a celebrity posted by the celebrity on his$/$her social media pages.

D$.$ B & C are both lawful to use.