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.

All automobiles must be fitted with seat belts.

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

B$.$ Macy's makes decisions in its self$-$interest, but Pizza Hut takes the social interest into account. Seat belts infringe individual choice and are against both self$-$interest and the soci

C$.$ Macy's and Pizza Hut marte decisions in the social$-$interest. Seat belts are in people's self$-$interest.

D$.$ Macy's and Pizza Hut make decisions in their self$-$interest. Seat belts are in the social interest, but people decide whether to wear them in their self$-$interest.