Given the task definition and input, reply with output. In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

A puppy is sitting in a yard and is at the door, asking to come in. A person looks out the door and sees the pup tremble, so the person can tell that (A) the dog is lonely (B) the temps have dropped (C) the puppy is happy (D) the pup is strong
B