Among following which is not true about virtual memory?

(A) Virtual memory makes the processes to stuck when the collective size of all processes becomes greater than the size of main memory.
(B) Virtual memory also allows files and memory to be shared by several different processes through page sharing.
(C) Virtual makes the the task of programming easier because the programmer need not worry about the amount of physical memory.
(D) Virtual help in executing bigger programs even greater in size that of main memory.