Computers use both electronic real memory $($RAM $)$ and hard disks to store data $,$ even though hard disks are this $?$ Select all that apply $.$ A$.$ Hard disks provide more storage space at a lower cost compared to RAM B$.$ Hard disks are faster than RAM and thus are used for temporary data storage Hard disks retain data even when the computer is turned off $,$ unlike RAM D$.$ The slow speed of hard disks enhances the overall stability of the computer system