Which sentence has no errors in capitalization or punctuation?

a.
"read longfellow's short poem "a psalm of life" and memorize the first eight lines," mother said.

b.
"read longfellow's short poem a psalm of life and memorize the first eight lines," mother said.

c.
"read longfellow's short poem 'a psalm of life' and memorize the first eight lines," mother said.

d.
"read longfellow's short poem "a psalm of life" and memorize the first eight lines, mother said.