Detailed Instructions: 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 grow foxglove [title] Purchase seed or seedlings from a garden store. [step] Foxglove seed is readily available in seed packets on most flower seed stands. If you decide to start foxglove from seed, you'll need to be ready to plant it in early summer. <sep> (A) In spring, you'll know it is ready to plant indoors. Keep in mind that seeds do best in low-humidity conditions and do not require direct sunlight for several months. (B) If you plan to keep the plant in the garden, plant it in the fall following the last frost. [substeps] You can also buy seed packets at gardening supply stores or online. (C) [substeps] Seedlings will germinate by growing inside 1 to 2 years. [substeps] Find a planting bed with a 45 degree slope, and mulch around it. (D) If you're planting seedlings, you may plant in spring or fall. [substeps] If you're starting from seed, use 4-inch seed trays with seed compost.
A:
D