Answer:
c. Foolishly sentimental.
Explanation:
The term "maudlin" is used to refer to someone who is drunk and acting or becoming foolish emotionally. It means when someone is drunk, so drunk that he/she starts acting sentimentally foolish.
So, to be maudlin is to behave in a foolish, emotional manner. It is when someone exhibits foolish, silly behavior, fused with an emotional reaction to it.
Thus, the correct answer is option c.