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 create a tropical area inside a house [title] Work out your layout. [step] If you already have such a thing as an atrium, space for a greenhouse or an old, preferably large bathroom or kitchen that you don't use, then it's a lot easier. Its not essential if you want just the odd. <sep> (A) The more space you have, the better it can be. [title] Consider the shape of the room as to your purposes. (B) [substeps] True-there's no need for a sauna or instant shower-30 minutes at a time generally works. But if you're building a large indoor studio that you can add to the outdoor space for transport is better than none. (C) Or, maybe you want a large space, such as a swimming pool with many fountains. Or maybe you want to start a safari park. (D) You can basically build a breeding area at the ground level with concrete underneath. [title] Arrange the base, walls, floor, outdoors area and some trees.
A