Definition: 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 care for trees on your property [title] Remove branches that are diseased, dead, conflicting, or broken. [title] Prune to increase the amount of light penetration into the crown of a tree or prune to improve structure or shape of the tree. [title] Cut just outside the branch collar on the tree. <sep> (A) [step] By cutting at a noticeable degree it gives you a good idea of whether the branch is diseased or healthy. A single branch will always make the tree taller. (B) [substeps] Always cut back to a lateral branch. When pruning a branch back to a lateral, the lateral branch should be no smaller than 1/3 the size of the branch being cut. (C) [step] Otherwise, the willow tree will not grow. However, pick up a piece of bark the same width as a stem or leaf below the branch collar. (D) [step] Leaving more than one branch exposed is troubling, and can lead to rot. [title] Make sure that when you trim or prune a tree it is as close to the actual bark color as possible, so both sides are shown.
Output:
B