Teacher: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".
Teacher: Now, understand the problem? Solve this instance: [header] How to grow winter onions [title] Prepare your plot in the late summer or autumn. [step] You can plant your sets as early as august, but many gardeners prefer to wait until october, when the weather has significantly cooled. You can even plant your sets in the early winter, as long as the ground has not become solid yet. <sep> (A) [substeps] Start from mid-january to october. [substeps] If you want to plant winter onions after the last frost in the summer and after it has either dropped below 40 degrees fahrenheit (4 degrees celsius) or been sufficiently dry, your plot should be ready by then. (B) Each set of onions can mature in the pot, so it is best to wait until summer to try again. [title] Choose a location to plant your onions, but keep away from those that are specific to your location. (C) [title] Check the weather forecast for the next growing season. [step] While healthy onions are hardy, they don't want to die if there's snow on the ground. (D) [title] Select a sunny spot in your garden. [step] Winter onions are hardy enough to grow in a variety of conditions, but they prefer to soak in full sun.
Student:
D