Instructions: 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".
Input: [header] How to bake a chilli chocolate sponge cake [title] Heat an oven to 160 c/325f/gas 3 (reduce by 20 c if using a fan oven ) [title] Grease a cake tin. [step] Use 20 cm (8 inches) square, or a spring-form pan. [title] Melt the chocolate. <sep> (A) [step] Melt the chocolate, the steps below take you to a cake tin. [title] Line the tin and pour in the egg. (B) [step] Add the melted chocolate and whisk the ingredients until smooth. [title] Add heavy cream and oil to the creamed ingredients and light oil to lower the heat to low. (C) [step] Measure out and place it in a microwave-safe bowl. Place the pot of water on a double boiler. (D) [step] This can be done using one of the three following ways : [substeps] Break the chocolate into as small pieces as possible and place in a small bowl. Boil a small pan of water, then place the bowl of chocolate within.
Output:
D