How do the following headlines concern self$-$interest and the social interest?

Macy's, the New York department store, is opening in Paris while Pizza Hut is expanding throughout Europe.

Cigarette packs must carry a health warning.

A$.$ Macy's makes decisions in the social interest, but Pizza Hut thinks only of its self$-$interest. Health warnings are in the social interest only if people behave in the social interest.

B$.$ Macy's and Pizza Hut make decisions in their self$-$interest. Health warnings are in the social interest, but people decide whether to heed them in their self$-$interest.

C$.$ Macy's makes decisions in its self$-$interest, but Pizza Hut takes the social interest into account. Health warnings deny free choice and are against both self$-$interest and the social interest.

D$.$ Macy's and Pizza Hut make decisions in the social$-$interest. Health warnings are in people's self$-$interest.