Read the passage.

"that thousands of sweepers …
were all of them lock’d up in coffins of black
and by came an angel who had a bright key,
and he open’d the coffins & set them all free.
then down a green plain leaping laughing they run
and wash in a river and shine in the sun."

what occurs in tom’s dream in william blake’s “the chimney sweeper”?

a. an angel rescues the sweepers from their coffins.
b. an angel removes all the grief from his past.
c. an angel gives tom opportunities for a different job.
d. an angel brings food and clothing to tom’s friends