Answer:
Informal meeting
Explanation:
Informal meeting is form of meeting that does not have a standard format.It is good in the sense that it allows one of the participant to be at ease and speaks more freely than would have done in a formal meeting.
This type of meeting will be more suitable for Miranda to address the matter with Lauren as she will most likely open up to Miranda concerning any issue that might have been affecting her performance more than she would have done in any other form of communication.
Moreover . This is the first observation and it is good to approach the issue in an informal way before taking it further if the situation persists.