Which of the following sentences contains a dependent clause?

A
He packed his suitcase and then called for a taxi.

B
After she left for the airport, Mia began worrying whether she had made the right decision.

C
Neither of the two wanted to be separated, but they knew it was necessary.

D
She waited at the door for some minutes before finally knocking.

Me read the letter. dear aunt mary, you for the wonderful painting. you are so talented! i was thrilled that you chose to paint horses. you must have remembered that i was crazy about horses when i was a little kid—and i still love them. i have hung the painting in my room so that i can see it every morning when i wake up. your loving niece, celia what makes this letter appropriate for its intended audience? it is written from the third-person point of view. it is concise and impersonal. its sentence structure is varied. its language is informal.