The correct answer is A. Memory.
A buffer is a temporary storage area used to compensate for the difference in speed at which the different units can handle data. It is used to store data that is being transferred from one device to another, or to store data that is being processed by a computer.
Memory is a storage area that is used to store data and programs that are currently being used by the computer. It is a volatile storage area, which means that it loses its contents when the power is turned off.
A accumulator is a register that is used to store the result of an arithmetic or logical operation. It is a temporary storage area that is used to hold data that is being processed by the computer.
An address is a unique identifier that is used to locate a memory location. It is a number that is used to access data that is stored in memory.
None of the above is not the correct answer.