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".

[Q]: [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.
[A]: C

[Q]: A man shows a video of himself training for the weightlifting events in the olympics. several times <sep> (A) he practices weightlifting while someone films him and clips him outside. (B) he is shown doing lift lifts and then off of the bar. (C) , times when they are in the olympics, coaches speak with them while the camera pans around the competition. (D) , he picks up weight and lifts it over his head.
[A]: D

[Q]: [header] How to avoid h1n1 [title] Get vaccinated against h1n1. [step] You are most likely to contract h1n1 during flu season. The cdc warns that every flu season is different and thus vaccinations are tailored for the season. <sep> (A) However, some vaccinations are more likely and safer than others. [substeps] You do not need to be a member of a group of people infected with the disease, or you risk exposing the sick person to h1n1. (B) You should still be vaccinated for h1n1 in groups of 6 to 12 months. Medicine should be used in non-vaccinated individuals during flu season. (C) Flu season is characterized between october-may (in the us). During that time, you should receive a flu vaccine, especially if you are 65 or older. (D) Make sure that you get them before you skip the winter vaccination. This is especially important if you live in the united states or canada because the diseases are usually more common for these countries.
[A]:
C