The correct answer is "a Man". Kipling ends his poem with the line "And—which is more—you'll be a Man, my son!" This indicates that Kipling is addressing his poem to youths who are not yet adults (or even immature adults). The speaker is a father-figure that intends to counsel his son about becoming an adult. The first stanza is about knowing oneself. The second is about knowing that we not always get what we want. The thirs is about being brave. The third is about knowing one's place in the world.
I am not completely sure, but this is how I would order these events:
Viola enters Orsino's court dressed as a male.
Olivia asks Cesario about his parentage.
Feste returns the ring to Cesario that Orsino had given to Olivia.
Sebastian reveals to Antonio that he has a twin sister.
Malvolio makes a fool of himself in front of Olivia.
Antonio offers to take Cesario's place in the duel.
Nurse advises Juliet to marry Paris because Romeo is in exile. Nurse thinks well of Paris.
Hope it helps!