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".

[header] How to kill aspen shoots [title] Treat the shoots in late summer or early fall, if you can. [step] Do this before the leaves change color. Herbicides are the best way to eliminate the shoots, though they will also kill the original tree. <sep> (A) [substeps] Removing the tree from the ground will also help prepare it for the next growing season. If you still have shoots on your tree, carefully remove them and repeat the process to see which ones you can eliminate the most quickly. (B) It takes several months for the herbicide to work. The best time to use it is right before the weather starts to cool down, since the tree will be in a dormant period anyway. (C) Also, if the cannot simply die off in the freezing season, you can kill the tree. [title] Keep in mind that young aspen is one of the most recent trees to be killed. (D) Be aware, though, that if you cut the branches back, there is no real danger of the aspen turning brown around the base. [substeps] Always use a horning gun or an electric razor to cut off the needles, if necessary.
B