Respuesta :
The answer would be D. "I made just one request for the camping trip: I wanted to stay in a cabin instead of a tent."
Generally colons are used after phrases that are complete sentences. "I made just one request for the camping trip" is a complete sentence, and should therefore have a colon after it.
D) I made just one request for the camping trip: I wanted to stay in a cabin instead of a tent.
Colons are used between two independent clauses to show that the second sentence is explaining the first sentence.