Answer: Controlling her surroundings
Explanation: The surrounding control is a technique which is used for effective communication. This is implemented from the end of receiver.In this strategy, the receiver tries to control the environment they work in so they can properly focus on the most important information.
In the given case, Katelyn ignores all other messages she had to receive so that she can give all her attention to the conference call.
Hence, we can conclude that Katelyn is using surrounding control technique.