The bolded section is after the comma

compare the bold sections of both sentences and then answer the question that follows:

original: my father disliked sleet, but my father disliked hail more.
revised: my father disliked sleet, but he hated hail more.

what was done to the bolded section to improve the sentence?
a. a longer phrase was converted to a single word.
b. a modifier that did not add meaning was removed.
c. redundant phrases were eliminated.
d. repetitive words were replaced with synonyms and pronouns.