Answer: Affiliative leadership style
Explanation: In simple words, it refers to a leadership style in which the leader focuses on establishing harmony and peace within its subordinates as they have a perception that best performance comes only when each and everyone truly support and trusts each other.
Such leaders tries different techniques and practices to make everyone in the group feel connected.
In the given case, Christina wants to resolve conflict within her subordinate and wants to hold breakfast meetings for that.
Hence she is using affiliative leadership style.