Which statement describes machine language?

Machine language is code expressed in the binary system and is the lowest-level set of instructions a computer can execute directly. In Information Technology, machine language instructions are made of bits, typically grouped into bytes or words, and each instruction corresponds to a specific operation supported by the CPU, such as loading data, performing arithmetic, comparing values, or branching to another instruction. Because it is binary, machine language is not easily readable by humans and is highly dependent on the processor architecture, meaning code written for one CPU type may not work on another. Option A describes interpreted execution, where code may be processed line by line. Option B more closely matches assembly language, which uses mnemonic commands that correspond to machine instructions and can reference registers more directly than high-level code. Option D describes high-level programming languages. Since the defining feature of machine language is that it is represented in binary and executed directly by hardware, the correct description is code expressed in the binary system.