Which of the following functions is$($are$)$ performed by the loader?

$($A$)$Allocating space in memory for the programs and resolve symbolic references between object decks.

$($B$)$Adjusting all address dependent locations, such as address constants, to correspond to the allocated space.

$($C$)$Physically placing the machine instructions and data into memory.

$($D$)$A system program that sets up an executable program in main memory ready for execution

$($E$)$All of the above