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]: [header] How to remove paint from a car exterior [title] Park the car on top of a large tarp or drop cloth to contain the old paint. [step] The old paint should be disposed of instead of letting it contaminate the ground. If an open area is not available, park the car inside a garage, but open all of the garage's windows and doors for ventilation. <sep> (A) Cover objects inside the garage to protect them from the paint dust. [title] Use masking tape to cover the areas of the car that won't be sanded. (B) Alternatively, use a flashlight to check beneath the tarp. [title] Use an old baseball bat, crowbar, pry bar, or other large object to push the old paint off of the vehicle. (C) [title] Wipe the paint with a wet cloth, a roller wrap or an old towel to protect it from oil and water. [step] The paint is likely to collect on these cloths and make them easier to clean as they are removed. (D) If your garage is not well ventilated, a ventilation device will block your windows when the old paint has dried to a mud-like consistency. [title] Pour a small amount of vinegar into a small bucket.
[EX A]: A

[EX Q]: [header] How to recognize and prevent a hookworm infection [title] Be aware of who is most at risk. [step] Some people are more likely to come into contact with hookworm infection than others due to their work, play, or other habits. Those most at risk include : [substeps] People who come into direct contact with soil contaminated with human feces such as gardeners, builders, plumbers, etc. <sep> (A) People with bare hands are at a higher risk for contracting hookworm with other people. Hookworm is a viral infection, and your body will not effectively fight the bacteria that makes up the infection. (B) Keep in mind that hookworm infection can cause gastrointestinal issues and can worsen over time. Tell your family, friends, and professionals what you are at risk of and where you are at before they know about it. (C) Products that might carry the disease contact with bee stings or pollination that might be harmful to bees also through play. Anyone under the age of 12 is at a higher risk. (D) Children who frequently play outside barefoot, or who play in contaminated soil. [title] Recognize the symptoms of a hookworm infection.
[EX A]: D

[EX Q]: [header] How to grow sweet onions [title] Aim to plant in early to mid spring. [step] Your onions will have the best chance if they're grown in loose, fertile, and well-draining soil with a ph between 6.0 and 6.8. Use a tiller to break up the soil in the garden bed. <sep> (A) In mature plants, the soil will also contain ample seeds and roots. [title] Choose a location in your garden with minimal direct sunlight. (B) Spread 2 inches (5 cm) of mature compost or aged manure over the garden bed and work it into the soil with the tiller. [substeps] You can test the ph of the soil with a home soil test kit or with a ph meter. (C) [substeps] Don't apply this fertilizer if you're growing tomatoes, cabbage, turnips, radishes, peppers, potatoes, or mangoes. [title] Keep the soil ph below 7.5. (D) Most of the time, the soil you plant is loamy; however, if you can't find this, you may have to move it to a pot with nutrient-rich soil. [substeps] You can transfer the roots of your onion plant to a hoe for deeper growing.
[EX A]:
B