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

The headline "Amazon Will Deliver Groceries For Free" is in

A$.$ the self$-$interest because it will increase the number of consumers who order from Amazon but not in the social interest

B$.$ the social interest because people will spend less time waiting in line at grocery stores but not in the self$-$interest

C$.$ neither the self$-$interest nor the social interest

D$.$ the self$-$interest because it will increase the number of consumers who order from Amazon and in the social interest because people will spend less time waiting in line at grocery stores

The headline "Food Must Be Labelled With Nutrition Data" is in

A$.$ the self$-$interest because everyone eats food and in the social interest because it is a mandate from the government

B$.$ neither the self$-$interest nor the social interest

C$.$ the self$-$interest because everyone eats food but not in the social interest

D$.$ the social interest but not the self$-$interest because the decision is not made by a single firm and does not necessarily reflect anyone's self$-$interest