Modern operating systems support multitasking by doing what? A) Keeping pending jobs available in memory as processesB) Sharing input and output devices between usersC) Distributing tasks as threadsD) Using hard disk space as an extension of memory

Option A is the correct answer to the following question.

Explanation:

Because multitasking is the process of an operating system in which provides users to accomplish more than one jobs at the same time, for example, we can listen music with creating documents in word such as we can do multiple jobs at a time by which we can save much more time to do other works. So, that's why the following option is correct.