B is corrent because the machine language must be designed for the specific computer and, therefore, is determined by the engineers who design the computer.
A is incorrect because the machine language is never alphabetic; it is of a binary form.
C is incorrect because machine languages differ among different computers. Also, machine languages differ from user programs (e.g., written in BASIC, COBOL).
D is incorrect because a programmer will not be able to write a program which will change the computer’s machine language.
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