Answer:B. instrumental aggression
Explanation:
Instrumental aggression defines an agressive behavior towards another person with an a of achieving something from them; a person acts agressive towards the other person with a goal in mind.
If a person succeeds in their attempted agressive behavior and they end up retrieving what they had aimed to earn they will repeat the same behaviour in the future.
Nicole is being agressive towards Heather with a goal which is to retrieve a cookie from Heather.