Which sentence is punctuated correctly?

a. "i would like to read a poem i wrote called wedding bells," my aunt explained.
b. "i would like to read a poem i wrote called 'wedding bells,'" my aunt explained.
c. "i would like to read a poem i wrote called wedding bells," my aunt explained.
d. i would like to read a poem i wrote called "wedding bells," my aunt explained.

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

i think ethier way not sure

there is no passage showing on my screen