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". 

We see a rowing machine in a exercise room. a lady <sep> (A) picks up a machine and lifts it to her shoulder, then drops it. (B) starts putting her feet in the turning machine. (C) sits on the seat and pulls the cord of the rowing machine. (D) pushes a machine.
C

A black screen appears and the yellow words appear on them read "extreme how-to presents". The second black screen has yellow words that read "installing heated floor tile". a man <sep> (A) is now standing and talking in the corner of a residential home, dressed in a long sleeved button up black shirt, brown long pants, shoes and wearing a hat. (B) is installing the hardwood floors. (C) starts sweeping the floor in a position and putting gel between the tiles. (D) is shown attempting to installation tile in various rooms, including the top floor.
A

[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.

A