What is the supertonic of the B minor scale?

The central character in The Member of the Wedding is a(n)

a. usher b. student at a private school c. flower girl d. child who wants to belong e. man who doesn't want to get married

Identify the Mozart opera that tells the story of a philandering, indeed murdering aristocrat, whose deviant behavior makes the peasants he exploits seem all the more noble

A) Le nozze di Figaro B) Idomeneo C) Don Giovanni D) Così fan tutte