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".
Input: [header] How to grow phlox [title] Decide which phlox variety you want to grow. [step] All species of phlox produce flowers in a wide range of colors including white, pink, red, lavender and blue. Different varieties serve different needs in the garden. <sep> (A) Look online, in books and magazines for a list of your preferred phlox plants. [substeps] Be aware that phlox can produce fewer flower buds than other varieties, so there is no ideal number of phlox plants in your area. (B) Do some research to decide which one is right for your growing zone. Purchase potted phlox plants sold locally at garden centers or farmer's markets for transplanting any time during the growing season. (C) [substeps] Plants that need flowers include daisies, petunias, roses, poinsettia, redbells, ginseng, wisteria and daisies. Tree phlox grow in leafy bunches that grow from twigs. (D) [title] Pick your phlox planting spot. [step] Phlox grow and grow on a large long range of plants.
Output:
B