Answer:
The correct answer is Angry
Step-by-step explanation:
Apologetic means excusing an offense or failure, Problematic refers to constituting a problem or difficulty, Democratic refers supporting democracy or its principles, and finally, Angry means having a strong feeling of displeasure or hostility towards something or someone.
Bearing the above in mind, it could be said that the meaning of the word "combative" is used as a synonym of Angry in the sentence "the candidate's speech was met with combative shouts from his opponent's supporters."