Historically, the reasons for Virtual Memory are

$1.$ To remove efficient and safe sharing of the memory by multiple programs.

$2.$ To allow the programming of a small limited amount of memory.

$1.$ To allow efficient and safe use of the memory by one program.

$2.$ To remove the programming burden of a small limited amount of memory.

$1.$ To allow efficient and safe sharing of the memory by multiple programs.

$2.$ To remove the programming burden of a small limited amount of memory.

None of the above