Which heading shows title-case capitalization?

• A. Introduction to Editing
• B. Introduction to editing
• C. Introduction To Editing
• D. Intro To Editing

Answer: (A)

Title-case capitalization means capitalizing the main words in a heading (nouns, verbs, adjectives, adverbs) while keeping short function words like articles and prepositions in lowercase. In a standard title-case heading, “Introduction” and “Editing” are the major words and are capitalized, while “to” is a short preposition and stays lowercase. That match is exactly what the heading “Introduction to Editing” demonstrates, making it the correct choice.

The other forms don’t fit because they break that pattern: one uses sentence case by capitalizing only the first word; another incorrectly capitalizes the short preposition “To”; and another uses an abbreviated form “Intro” instead of the full word, which isn’t typical for a clean, formal heading.