<span>Felipe looks over his presentation, and he notices that some of his words are written in bold and some are written in italic.</span>His ability to remember these differences is an example of Retroactive encoding. Even though you didn't share the options, I am pretty sure this one will help!
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.
The system software consists of the programs that control or maintain the operations of the computer and its devices.
