which theme is best supported by these lines from The Crossover?

“ You’re twins, not the same person./ but that doesn’t mean he has to stop loving me./ your brother will always love you, Josh”

a. Love can be forgotten.
b. Twins have a stronger bond than other siblings.
c. Change is part of all relationships.
d. Siblings rarely forgive each other.

c. Change is part of all relationships.