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 have a good house party [title] Have a themed party. [step] An easy way to throw a great party is to have a themed party. By creating a theme for your party, you can easily make the decorations, food, music, and activities match each other making the party cohesive. <sep> (A) Themes can be anything from a certain time period like the fifties to colors like a red and black party. You can also theme a party on a certain holiday like valentine's day or the 4th of july. (B) A theme can help you to work out how all the guests will share the party. [substeps] Look for songs appropriate to your party theme, e.g., " all too soon " by the beatles, " poker party " by musty's " medicine men ", and other cool party music. (C) [substeps] Have everyone prepare a theme of your party so everyone can participate in the party. [title] Host the party in a set area. (D) You should decide on the theme before you have the party itself, so that you don't have to spend so much time looking for them. [substeps] Categories of themed party serve different purposes.
Output:
A