Which sentence uses punctuation correctly?
a. i enjoy, mozart's opera the magic flute, even more than i like his symphonies.
b. i enjoy mozart's opera the magic flute even more than i like his symphonies.
c. i enjoy mozart's opera, the magic flute, even more than i like his symphonies.
d. i enjoy mozart's opera, the magic flute even more than i like his symphonies?