Which option correctly uses a colon to introduce a list? You will need three things, a map, a flashlight, and a compass.

• A. You will need three things; a map, a flashlight, and a compass.
• B. You will need three things - a map, a flashlight, and a compass.
• C. You will need three things: a map, a flashlight, and a compass.
• D. You will need three things, a map, a flashlight, and a compass.

Answer: (C)

Introducing a list after a complete statement uses a colon. Here, the sentence before the colon, “You will need three things,” is a complete thought, so it properly signals that what follows is the list of those things. The items that come after a colon—“a map, a flashlight, and a compass”—are parallel noun phrases, separated by commas with “and” before the final item, which is the standard list format after a colon.

Using a semicolon wouldn’t fit because it links two independent thoughts, not introduce a list. A dash can sometimes be used to add emphasis, but it’s not the formal, conventional way to herald a list. A comma wouldn’t clearly mark the list and would feel like a weaker connection or a run-on. The colon provides the clear, formal cue that what follows will enumerate the needed items.