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".
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Question: [header] How to introduce a pleco to a goldfish tank [title] Ask how large the pleco will grow to be. [step] Although most pet stores will sell plecos that are only a few inches in length, you should know that they can grow quite large. Fully grown plecos can reach up to two feet in length. <sep> (A) [title] Check your tank's surface before you place the pleco into the tank. [step] Make sure that your aquarium is opaque or has a drop-down tray so that your pleco is not exposed to water. (B) This can have a negative impact on their lifespan. [title] Choose a tank with large walls and no air holes. (C) [title] Make sure you cover more than twice the tank. [step] If you find that your pleco grows too much, cover the entire tank with a blanket. (D) The exact size of the pleco will vary depending on the species. Ask someone at the pet store how large the pleco will get before making a purchase.

Answer: D

Question: A large group of people are seen standing around a square with people playing volleyball. the people <sep> (A) continue playing along with one another and dance around the area. (B) volley the ball all around one another while scores are being made above the players. (C) continue playing and kicking the ball around a bit while others watch on the sidelines. (D) continuously hit the ball around the sandy field as the camera pans around them playing.

Answer: D

Question: [header] How to convince others that you are not shy [title] Greet people with a smile. [step] It may sound simple, but starting a social interaction off with a welcoming smile makes you seem more approachable, friendly, and self-confident, all without saying a single word. [substeps] Don't hesitate to smile as you introduce yourself in social situations. <sep> (A) Smiling is meant to make you seem human and approachable. [title] Research the types of people you want to attract. (B) Take the time to smile and say hello, even if you aren't well acquainted with the person. [title] Don't interrupt family and friends. (C) It shows you aren't afraid to make a new friend. If someone asks you to do anything, say no, but accept the invitation to do something that will earn you extra attention or make it more interesting for the new person. (D) This makes people feel welcome to engage with you. Smile when people you're talking to make a joke or to offer encouragement as they continue speaking with you.

Answer:
D