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". 

[EX 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.
[EX A]: D

[EX Q]: [header] How to plant switchgrass [title] Pick a switchgrass variety. [step] If you look for switchgrass at your local nursery you may just find a plant that's labeled " switchgrass, " but there are actually several varieties that differ in color and size. Switchgrass blooms for almost half the year, and during the winter and spring it's usually brown. <sep> (A) [substeps] Magnolia trees produce about 50% of the moisture. Maple trees produce 50% of the moisture per year. (B) Both varieties of switchgrass produce pretty stunning flowers, unique patterns, and flowers. Most also have phlebotomists at the planting areas where it grows. (C) These are factors to keep in mind when you're choosing a variety for your garden. Here are a few types commonly grown in home gardens : [substeps] Northwind: grows four to six feet tall and produces yellow blooms. (D) Pine needles will establish a base that's ready for planting a newer, more established fire from. [substeps] Switchgrass colors for more variety can also be found at a garden center or online.
[EX A]: C

[EX Q]: [header] How to develop a ninja like physique [title] Clear a space on the floor, large enough for you to lay down in. [title] Start stretching your legs by sitting on the ground, with your legs in a v shape. [title] Push them as far as part as you can without hurting yourself too much. <sep> (A) [step] You should fell a little bit of a stretch, but it shouldn't hurt too much. [title] Keeping your back as straight as possible throughout, reach for your right foot first and hold it for 30 seconds, then reach for the other foot. (B) [title] Use a barbell to elevate yourself up. [title] Use the muscles in your legs to push against the wall. (C) [title] Slowly begin to push your legs flat. [title] When you feel your toes begin to put weight on them, stand up and gently push your feet off the ground and lean back on your arms to take your weight off them. (D) [step] Once you have done this, give yourself a little more stretching time to get used to the feel of training. [title] Stretch your arms by gently pulling them out of the v-shape to keep them in place.
[EX A]:
A