read these lines from a poem by emily dickinson.

success is counted sweetest
by those who ne'er succeed.
to comprehend a nectar
requires sorest need.

what theme is expressed in these lines?

a.
one’s needs are determined by one’s wants.
b.
struggling makes you appreciate the times when you are thriving.
c.
life is better when you have very little.
d.
you should learn to value everything you have.