It's 'in those days'.. specifying those days as in the past.
A.
The person should look to create a plan of action for the future and prevent the crisis from escalating rather than dwell on why it happened.
Answer: D) The rules of communication
Explanation: Conventions in language are tests in which students learn how to communicate properly. Understanding language conventions lets people know how language works, how to successfully convey their message as they speak or write, and how to listen and interpret. Therefore; they are the rules of communication.
