In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 

[header] How to involve a dog in pet therapy work [title] Consider your dog's temperament. [step] The main requirement for a therapy dog is that they must be incredibly calm, emotionally secure, and comfortable around all types of people. If your dog is nervous, shy, aggressive, or has any other qualities that cause him to behave in standoffish or threatening ways around people, then he would not be a good fit for therapy work. <sep> (A) Decide what you will be doing with your dog before giving it time to develop socialization skills. [substeps] Common characteristics of a therapy dog include a poor attitude, lowered behavior, and aggression. (B) A therapy dog needs to be calm and comfortable when : [substeps] He is approached by or surrounded by many people (children or adults). He is roughly touched or hugged by someone. (C) [substeps] This is especially true if he is a tense, unpredictable, and impolite dog. [title] If your dog is at a loss for words, help him learn some helpful skills. (D) [substeps] Dogs with a history of trauma and anxiety are less likely to engage in therapy. Anxiety, fear, or mistrust issues can cause a good experience for a therapist with a pet.
B

More shots are shown of a website as well as the outside of the shop while the men continue to speak. more people <sep> (A) then arrive to take pictures and a bored man is unable to participate. (B) are shown drinking coffee as well as sit in front of their computer talking and participating in the board as well as meeting with one another and riding in a raft. (C) are seen getting tattoos while the men still speak to the camera. (D) are then seen controlling a large group of horses and leading them around a very large gate as well as running underneath it and bumping into the fences.
C

There are several people getting ready to ski. there <sep> (A) 's a person skiing downhill with full speed whose shadow can be seen. (B) are several tubes lined up in a lined pathway going down a hill. (C) is a man sitting at a piano and playing the piano for the very first time. (D) are numerous inches of snow on the ground and they're playing snowboard.

A