Assembly Language

D.

The computer language that is closest to machine code is assembly language.

Assembly language is a low-level programming language that is designed to communicate directly with the computer's hardware. It is considered a "low-level" language because it uses mnemonics, or symbols, to represent the machine code instructions that are executed by the computer's processor.

In assembly language, each instruction corresponds to a specific operation that the processor can perform, such as loading a value from memory or adding two numbers together. Because assembly language instructions are designed to be directly executable by the computer's hardware, they provide a high degree of control over the system and can be used to optimize performance in certain applications.

In contrast, other types of computer languages, such as query languages, scripting languages, and markup languages, are typically higher-level and more abstract. Query languages are used to retrieve data from databases, scripting languages are used to automate tasks and create dynamic web pages, and markup languages are used to format text and other content for display on web pages. These languages are generally further removed from the underlying hardware and provide less direct control over the system.