It seems to be a because none of the others make sence
Answer:
Muffled in this sentence means that he was wrapped up warm in his hat.
Explanation:
muf·fle
/ˈməfəl/
verb
past tense: muffled; past participle: muffled
wrap or cover for warmth.
Her actions reflect civil disobedience because she knows its wrong but she does it anyway to stand up for what she feels is right