The answer is D. Electoral College
I believe the answer is annual maintenance
Hope this helps :p
Edits in the document are called, C. Track changes
Answer:
The project file can be managed by making its multiple version due to the following reasons.
1. We can create multiple copies or version of the project to avoid any unfortunate circumstance such as Project file can be corrupted or can be deleted. In that case we can use the other version of that project file.
2. When we are working on some project, we are modifying the code or program to achieve our desired results. In this process we may forgot the changes that we have made while modification. If we does not obtain our desired results while modification that can lead to losing the original file. To reduce this type of risk we create multiple versions of project File.
3. We also create version of our project files on some internet drives as a backup. In case our computer has lost or operating system has been corrupted. A version of our project file is available on Internet drives such as Google drive or Drop box.
