Answer:
What best explains her actions is convergence.
Step-by-step explanation:
In communication, convergence refers to adaptations one does to one's speech in order to identify oneself with another individual or with a group. For instance, it is common for couples to develop a way of talking to each other that is specific, that uses certain words, which identifies them as a couple.
That is what Lt. Charles is doing. She is changing her speech in order to be seen as part of the group.