Which sentence form Frankenstein most directly references the title character?

Which sentence form Frankenstein most directly references the title character?

a. “Two years after this event Caroline became his wife.”
b. “She was not her child, but the daughter of a Milanese noblewoman”.
c. “No human being could have passed a happier childhood than myself.”
d. “His limbs were in proportion, and I had selected his features as beautiful.”