Which question is a statistical question?

A How does my brother rate the taste of ice-cream on a scale of 1-10?How does my brother rate the taste of ice-cream on a scale of 1-10?

B Does my father or my mother like the ice-cream from the grocery store better?Does my father or my mother like the ice-cream from the grocery store better?

C How do I rate the taste of ice-cream on a scale of 1-10?How do I rate the taste of ice-cream on a scale of 1-10?

D Which brand of ice cream is preferred by the people shopping at a grocery store?

D Which brand of ice cream is preferred by the people shopping at a grocery store?

The statistical question is: "Which brand of ice cream is preferred by the people shopping at a grocery store?" (Option D)