The answer to this question is b that's the answer
Answer:
previousAddition instance variable
Explanation:
In order to accomplish this you would need to add a previousAddition instance variable. In this variable you would need to save the amount that was added at the end of the process. Therefore, if a mistake were to occur you can simply call the previousAddition variable which would have that amount and subtract it from the total. This would quickly reverse the mistake, and can be easily called from the undo() method.
DNS is a distribute database that can return the address of a named machine.
A. performance because a poetry reading is when a poem is read out loud to an audience.
Usually, network devices can be set up to send their syslog messages to a syslog server, so you'd just need a *nix computer with syslog setup to receive messages via the network, and you can read stuff there. You also get the advantage of having reglar expressions so that "noise" (messages you don't care about) isn't displayed.
Network devices can also be set up to use SNMP (Simple Network Management Protocol).