What is used to declare your own event in C#?

Answer the following statements true (T) or false (F)

1. Under MS-DOS, physical I/O is supported by a hardware dependent module called MSDOS.SYS. 2. Under MS-DOS, MSDOS.SYS accepts logical I/O requests from application programs or other operating system modules, translates them into physical I/O commands, and passes the physical commands to IO.SYS. 3. Under MS-DOS, only MSDOS.SYS, the machine dependent module, communicates directly with peripheral devices. 4. Under MS-DOS, each physical device attached to the system is described in a special file called a BIOS. 5. MSDOS.SYS is the MS-DOS file system.

____ semaphores are used in the solution to the readers and writers problem that does not involve starvation.

A. Zero B. One C. Two D. Three