Suppose that an integer A that is to be incremented by 1 is located in a file that resides on a magnetic disk. what is the second increment step will proceeds: O a Copy the disk block on which A resides to main memory. Ob. Copy A to the cache and to an internal register. OG The copy of A appears in several places O d. Once the increment takes place in the internal register, the value of A differs in the various storage systems. A computer system resources that may be required to allocate is: O a. CPU time O b. memory space OC file-storage space O d. All above