Handling difficult questions. It is important not to start responding to a difficult question before you have thought about the answer. Repeating the question and asking for clarification will help create some space for your thoughts.
Make sure all loads in vehicle are turned off, key is in the off position. Disconnect the negative battery terminal first then the positive terminal. When installing the new battery connect the positive terminal make sure not ground out the tool your using while tightening the positive terminal.
If you connect negative terminal first, there are chances are circuit to be shorted while positive terminal is connected. Always while connecting, positive terminal first then negative and the ground (to avoid fuse). While disconnecting negative terminal comes first.