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 feed a warm season lawn [title] Take a soil sample of your lawn. [step] A soil sample will give you an evaluation of the nutrients and determine what amendments or fertilizers will work best for your lawn. To take a sample, use a gardening spade and dig 5 holes that are 6-8 inches (15-20 cm) deep in several areas of your lawn. <sep> (A) [substeps] Avoid digging any deeper than the hole you are taking your soil sample from. Digging 4 holes too deep, or too small, could cut off the nutrients your soil provides for its root system, which could cause your grass to die. (B) Put the soil that you unearthed in a clear container and send it to your nearest cooperative extension. [substeps] You can take samples of your soil annually to keep up with the changes in nutrient content. (C) If the holes are shallow, use a flashlight or electronic device to locate the depth on the soil. [substeps] You can purchase soil samples at most major gardening and home improvement stores. (D) [substeps] Be careful, as you could trip on a garden hose and injure yourself. You can disinfect the soil during use by using two or three levels of bleach to dissolve it, then repump if necessary.
[A]: B

[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]: The black cat is sitting right next to her and playing with the yarn while the brown cat is watching them. the black cat <sep> (A) grabs the yarn ball and start playing with it. (B) got up and the brown cat followed, then the black cat walked in front of the ball smoking a cigarette. (C) is enjoying the yarn being knit in her lap. (D) is smiling to the camera smiling as he uses his claws to draw the yarn on the blue yarn.
[A]:
A