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: The boy watches his mom vacuum as he jumps on the bed. The boy then lays down on the bed as he sees his mother finish the job. then the boy <sep> (A) shows his stomach as she vacuums the bed. (B) plays the accordion and pans the camera to his dad playing the accorion. (C) plays with some toys and walk down a street as he looks at a lot of houses. (D) gets off the bed and jumps down to the ground to look under the bedside table.

A: D
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Q: [header] How to choose a protein supplement [title] Choose whey protein to build muscle. [step] If you're looking for muscle-building protein, whey protein is generally your best option. Whey protein can come in the form of powder or pills and is commonly used when people are trying to build muscle via things like weight training programs. <sep> (A) By doing this, you're gaining more body fat and growing more muscle at the same time. [substeps] Whey protein can be found in half of the packaged foods. (B) Whey protein is also a low-fat protein, rich in red blood cells from bacteria. Although whey protein does not impart healthy fats to the body, whey protein helps build muscle, which you can grow and burn through exercise. (C) [substeps] Look for a whey protein powder or supplement with a high biological value. This measures how well your body can absorb the protein. (D) Whey protein occurs as a food chain, hence the slogan, " protein is fat free ". [substeps] Whey protein is complex and varies from patient to patient.

A: C
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Q: [header] How to make a heating pad [title] Fill an old sock with uncooked rice. [step] The most simple method for a reusable rice-filled heating pad. It just requires and old sock, some rice, a microwave and something to tie or sew the sock shut. <sep> (A) Be sure it's very dry with a little bit of knot to prevent fraying when it's tewn. [title] Heat the rice material to a comfortable temperature before sticking the heating pad to it. (B) No need to use wood, so long as it's folded closed. [substeps] The extra rice will pass through the tightly sealed parts of the sock. (C) Pre-soaked rice is the best option. [title] Cover the tab that is on the base of the heating pad. (D) First of all get hold a a good sized clean cotton sock that you won't miss, and then pour in the rice. [substeps] There is no fixed amount of rice to use, but it is recommended that the sock be at least half or three quarters full.

A:
D
****