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 prune houseplants [title] Use sharp scissors or garden shears. [step] Make sure the scissors or garden shears are very sharp, as dull shears can damage the plants. If you notice any dirt on the shears, soak them in water with a teaspoon of bleach and then wipe them dry. <sep> (A) [title] Determine how many cuttings you wish to create. [step] Many houseplants are grown in zones c and 7. (B) A clean tool will ensure your plants are not exposed to bacteria or pests when you prune them. [substeps] You can find garden shears for pruning online or at your local hardware store. (C) [substeps] Plastic surgeon-grade gardening scissors are not recommended for untrained gardeners. [title] Trim away diseased or misshapen plants. (D) [substeps] If you see a pop of rust on the blades after cleaning them, then the tools may be too dull or abrasive to use. Do not use sandpaper on the blades when pruning your houseplants.
B