Given the task definition and input, reply with output. 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 bathe a tortoise [title] Fill a shallow container with water. [step] The container should be small enough on the sides that your tortoise should be able to climb out of it. Add lukewarm water to it. <sep> (A) Turn on the hose using the maximum setting. Fill it to near full capacity, and place it near where your tortoise will be. (B) Start by filling it about 2-3 feet (0.91-0.91 m) up to the rim. The water should be very hot so stay at the tortoise's level for about 30 minutes. (C) Make sure the tortoise's head pokes above the water when he's in it, but it should be about chin deep. [substeps] You can also place one end of the tub on a book to create a slight angle, making a shallow end and a deep end. (D) Add the tortoise's necessary ingredients, such as soap and shampoo. [substeps] Adding the liquid before adding the water will help your tortoise's body maintain its basking position.
C