Computer science or computer software
Answer:
I am pretty sure it's D. to teach strategy and critical thinking.
The read-write type of memory helps in reading as well as writing data. This computer memory is used by users to continually update the data (to access (read from) or alter (write to) ) that is held on hardware storage devices. Internal or external hard disk drives, rewritable CDs or small flash drives can be all physical setups of read-write memory.
Character command shows the status.