Comprehensive and Detailed Explanation From Exact Extract:

Markup languages, such as HTML and XML, are designed to structure and format content, not to perform computation or execute algorithms. According to foundational programming principles, this focus on describing content distinguishes markup languages from programming languages.

Option A: "It supports decomposing programs into custom types that often combine with other variable types into more concepts." This is incorrect. Markup languages do not support programming concepts like custom types or variable combinations. They focus on tagging content (e.g.,

for paragraphs).

Option B: "It allows variables to change type during execution." This is incorrect. Markup languages are not programming languages and do not involve variables or execution. Typing (dynamic or static) is irrelevant to markup languages.

Option C: "It requires fewer variables and variable conversions than other languages because the types can change during execution." This is incorrect. Markup languages do not use variables or support execution, so the concept of variable conversions or dynamic typing does not apply.

Option D: "It does not perform complex algorithms, but instead describes the content and formatting of webpages and other documents." This is correct. Markup languages like HTML and XML are used to define the structure and presentation of content (e.g., webpages, documents) without executing algorithms or performing computations.

Certiport Scripting and Programming Foundations Study Guide (Section on Markup Languages).

W3Schools: “HTML Introduction” (https://www.w3schools.com/html/html_intro.asp).

Mozilla Developer Network: “HTML Basics” (https://developer.mozilla.org/en-US/docs/Learn/Getting_started_with_the_web/HTML_basics).