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 recognize chickenpox [title] Watch for symptoms on the skin. [step] Approximately one or two days after developing a runny nose and sneezing, you may see red spots on your skin. These dots often start on the chest, face, and back, are often itchy, and can quickly spread to the rest of the body. <sep> (A) [substeps] When this occurs, it may also be due to a new virus. If you experience any major allergic reactions to chickenpox, such as hives or rashes, contact the doctor. (B) If you suspect that you may have chickenpox, you can easily detect these signs and get medical care. [substeps] These red itchy spots may be small, crisp, or feel tight when you press them onto your skin. (C) [substeps] If you are experiencing a runny nose, you may also develop a flu or fever the following day after taking chickenpox. Syphilis, the " natural flu, " often shows up early in the infection, and even greater in children. (D) [substeps] These red spots will turn into red bumps and then small blisters (vesicles). These spots contain the virus and are highly contagious.
[A]: D


[Q]: [header] How to choose the best hula hoop (adult sized ) [title] Measure your height from the floor to your belly button. [step] This measurement will then help to determine the diameter of the hoop you should purchase. The hula hoop, when resting vertically on the ground, should reach somewhere between your waist and mid-chest. <sep> (A) [substeps] Example: if your height is 36 inches (76 "), then 118 inches (77 ") would be the minimum height. For kids, this would be 24 inches (76 "). (B) This is your base diameter measurement and can be adjusted slightly depending on your size and experience level. [substeps] For example, most adults will begin with a hula hoop between 40 and 44 inches in diameter. (C) [title] Find a hoop that you know you can balance on. [step] This will improve the stability of the hoop and prevent you from accidentally dropping the ball while on it. (D) Your waist should be about an eighth of an inch shorter than the hoop. You should also measure your waist from hips to ankles, and to knees with a ruler or measuring tape.
[A]: B


[Q]: [header] How to buy dry ice [title] Pick up dry ice at your local grocery or general merchandise store. [step] Stores that sell dry ice include safeway, walmart, and costco. [substeps] Plan to pick up dry ice as close to the time you will need it as possible. <sep> (A) What's more, dry ice is especially a benefit when it comes to early winter air pollution. Dry ice, also known as " warm ice, " includes the following: melted ice, freezer burned, and the equivalent elements. (B) You want to make sure that your feet are dry enough before purchasing dry ice. If the area you're new to will likely be dry, you may want to move to the beach to dry ice ahead of time. (C) Since it is constantly changing from solid to gas, it has a very short shelf-life. Every 24 hours , 5-10 pounds of dry ice turns from a solid to a gas. (D) Dry ice is overfrozen, and can accumulate in spots where you will not need your dry ice. You can also buy dry ice at your home improvement store or online.
[A]:
C