The correct answer is: A. ADD 5
A machine language instruction is a set of binary digits that tells the computer what to do. It is the lowest level of programming language and is directly executed by the computer’s hardware.
Option A, ADD 5, is a machine language instruction that tells the computer to add 5 to the value of a register.
Option B, 10001101, is a binary number that could represent a machine language instruction, but it is not necessarily a machine language instruction. It could also represent a data value or a control signal.
Option C, GOTO XOUT, is a high-level programming language instruction that tells the computer to jump to the instruction labeled XOUT. It is not a machine language instruction.
Option D, All of the above, is incorrect because not all of the options are machine language instructions.
Option E, None of the above, is incorrect because option A is a machine language instruction.