A) True or false? Relocation of a program in main memory is impossible during execution. B) True or false? When a program is compiled and linked, the compiler and linker must know where in phsical memory the program will be loaded. C) In a system that has one base register and one limit register, when a program needs to fetch data that has virtual address 15000, the hardware automatically D adds 15000 to the limit register. D references physical address 15000. D subtracts the limit register from 15000. D adds 15000 to the base register. D) In a system that has one base register and one limit register, a program that is 20000 bytes long is loaded at physical address 50000. What values are stored in the base and limit registers? base 20000 limit 50000 base 30000 limit 20000 base 50000 limit 20000 base 20000 limit 30000