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 kalanchoe [title] Make a root cutting from an existing plant. [step] The best way to grow a kalanchoe plant is to take a cutting from a fully grown plant, then and planting the cutting to grow a new kalanchoe. Use a sharp pair of gardening shears to snip off a branch of a fully grown kalanchoe branch. <sep> (A) Cut off the branch as soon as you have sliced it and another branch after making your cut. New branches that grow out from the cut may be diseased or sickly. (B) [title] Begin by cutting off approximately 2 third of the branch. [step] After you cut off the branch, move on to clearing up any other areas of the branch with your shears. (C) Remove all the leaves on the lower 2 inches (5.08 cm) of the branch except for 2 leaves. [title] Let the cutting dry for 3 days. (D) Use a sharp fish-eye pinch saw to shave the branch into very small pieces. After this, separate the leafy end of the branch into an oval a half inch wide (1.5 cm).
Student:
C