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 elevate your hand while sleeping [title] Sleep on your back or side. [step] In order to elevate your hand while you're sleeping, you'll need to sleep on your back or on the side opposite of the arm that needs elevation. This is the easiest resting position for elevating your hand. <sep> (A) [substeps] Lying on your side not only has been shown to help alleviate hand inflation, but it also improves circulation in and around the hand and wrist joints. It's also more efficient than sleeping on your side. (B) [substeps] You can use a pillow to support your arm when you start to feel like your hand's elevating off the ground. Place a rolled up towel over your head to help prevent air from pooling near your arm. (C) [substeps] Sleeping on your stomach won't allow you to elevate your hand as easily. It's much harder to prop it up from behind if you're lying flat on your stomach. (D) [substeps] Lie on your back with the pillow propping your head up at a 45 degree angle. Your dominant hand should support the bottom of your pillow.
C

[header] How to choose a secondhand engagement ring [title] Visit a respected local jeweler. [step] Some jewelry stores carry a selection of secondhand or vintage engagement rings. Research local jewelers to find a trustworthy shop in your area. <sep> (A) Use the store's contacts to carefully inspect the rings and design design, but ask the jeweler if there are any indication that they intend to sell them. [title] Ask friends or family members who have similar ring engagement rings. (B) Alternately, ask your friend or family representative if they know of any reputable appraisers in their area. [substeps] Different shops will be exclusive, so ensure that the jeweler you seek matches your ring to that of your friend or family member. (C) [title] Look for a good price and type of ring you want. [step] Don't be picky when choosing online. (D) Consider how long the business has been open and ask friends or family if they are familiar with the business. A reputable jeweler will typically have an in-house gemologist and repair and resizing services.
D

A man wearing a black baseball hat and a black shirt is playing an acoustic guitar. He is playing the beatles song yesterday on his guitar. he <sep> (A) continues to play and laugh with the camera. (B) stops playing the song and looks up. (C) plays till the entire song is over and then stops and smiles at the camera. (D) continues to play the england organ that is set up on stage.

C