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 make a plasticine volcano [title] Choose the plasticine. [step] You'll need brown plasticine for the bulk of the volcano, white plasticine for the snow cap and red or orange plasticine for the lava. If you want a green landscape around the base of the volcano, you'll also need some green plasticine. <sep> (A) [title] Make a construction paper or thin cardboard base for shaping the volcano. [step] You'll need a basic cone shape for the volcano, so make a basic cone with a large opening from either construction paper or thin cardboard. (B) [substeps] Consider using two separate plasticine containers to make plasticine volcano balloons. Mixing in the brown plasticine into the red or orange plasticine will create a cone-shaped form. (C) For an ice cream volcano, you can use green/orange plasticine instead. [substeps] To make your volcano fizzes, mix up a pint of warm water with 5 ml of distilled white water. (D) White plasticine is a great choice for adding color to many volcano bases, as it gives the volcano its unique time period, appearance and base. [substeps] For the best results, start with a color that you can identify using the color chart on the packaging.
A