Which of the following should be capitalized?

• A. The main words in titles
• B. The president of the company
• C. july in the calendar
• D. historical periods

Answer: (A)

This question tests capitalization rules for titles, focusing on which words in a title should be capitalized.

In title case, the important words—the nouns, pronouns, verbs, adjectives, and adverbs—get capitalized. Short or less substantive words (such as articles, short prepositions, and conjunctions) are typically kept lowercase unless they’re the first or last word of the title. The phrase The main words in titles illustrates this idea by capitalizing the key parts of the phrase itself.

The other options don’t fit this pattern. The president of the company would only have capitalization if used as a formal title before a name (e.g., President Smith); in ordinary text, it’s not capitalized. July should be capitalized because month names are proper nouns. Historical periods are usually lowercase unless you’re naming a specific period (like the Renaissance), in which case it’s treated as a proper name.