The correct answer is 'sentimental in an excessive way' (option C). MAWKISH describes something that is excessively sentimental, sappy, or emotional in a way that feels insincere or cloying. 'A person who mocks someone' is incorrect (that's a mocker), 'excessively meek' is unrelated (meek means submissive), and 'very muddy' is a literal confusion with 'mawk' which originally meant maggot but the word evolved to mean sentimental.