Which capitalization is correct?

• A. Nile River
• B. The Nile River
• C. The Nile river
• D. The nile River

Answer: (B)

The main concept here is capitalizing proper nouns in a multi-word geographic name. Each word that is part of the official name should be capitalized, since the Nile is a specific river and “River” is part of that official name.

So, the correct form is “The Nile River.” “Nile” is a proper noun, and “River” is treated as part of the official name, both capitalized. The leading article is capitalized when it’s considered part of the official name, which is common in this usage.

The other options miss these ideas: omitting or lowering the article changes the recognized official form, and capitalizing only part of the name (or not capitalizing “River”) doesn’t follow the standard capitalization for multi-word geographic names.