Which statement about string is best supported by evidence in the play?

a.
the symbolism in string is centered on the character katy, whose innocence is a major contrast to joe's guilty conscience.

b.
the primary theme of string is that differences between the races can be overcome by love.

c.
the setting of string shows what happens to people when basic needs, such as shelter, cannot be attained.

d.
the characters in string each represent a different way that african americans cope with disenfranchisement.