Read this stanza from the poem "Friendship.
Friendship needs no studied phrases,
polished face, or winning wiles;
Friendship dons no surface smiles.
Which theme is best communicated in the stanza from "Friendship"?
A. One must be very intelligent to be a true friend.
B. The best way to make friends is to praise people you like.
C. A true friend has a smile to offer, even in the worst of times.
D. True friendship goes much deeper than polite social interactions.