The statement "All programming languages must:" does not have a definitive answer among the options provided. Here’s a brief explanation of each option:
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Be compatible with HTML: Not all programming languages need to be compatible with HTML. HTML is primarily a markup language used in web development.
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Have a pseudocode base: While pseudocode is a useful tool for planning and communicating algorithms, not all programming languages are based on it.
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Be translated into binary: Most programming languages ultimately need to be translated into machine code (binary) for execution on a computer. However, high-level languages may also be interpreted rather than compiled.
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Be compatible with C++: Just like with HTML, compatibility with C++ is not a requirement for all programming languages. Each language operates independently.
Given this analysis, the most accurate choice is "be translated into binary", as most programming languages ultimately work with machine code in some form to be executed by a computer. However, it's important to note that this doesn't imply that all languages are compiled; some are interpreted or have mixed approaches.