Which sentence contains a capitalization error?

• A. Martha took her son to the country inn.
• B. Canada is a country in north America
• C. His sisters name is Kate Morning
• D. The school took a field trip to the White House

Answer: (B)

Capitalization of proper nouns, especially geographic regions, is what this item tests. A continent or region name is a proper noun and must be written with a capital first letter. In the sentence "Canada is a country in north America," the words "north America" are not capitalized correctly; they should read "North America" because they name a specific region. The rest of that sentence uses correct capitalization for the country name "Canada." The other sentences show proper capitalization as well—names like "Martha" and places like "The White House" are correctly capitalized. The key idea here is that regions and other proper nouns always start with a capital letter.