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". 

[Q]: A man shows how to change a tube in a tire. he <sep> (A) puts a jack under the tube to lift it up. (B) puts a new tire on the tube. (C) takes the old tube out, puts the new one in, then pumps it up. (D) moves dirt covering the tube.
[A]: C


[Q]: The judges then take turns speaking with her expressing their approval, and the girl is very happy about it. the girl <sep> (A) then gets her hair pulled by her teachers and the judges and a team of teammates play rock paper scissors to try and get her to speak. (B) has about fifteen minutes to make a wish and she makes the wish successfully. (C) is shown very happily scratching her body thoroughly when she has her final result and she smiles happily. (D) then runs off the stage and behind the curtains she gives a man who is possibly her dad, a kiss and a hug.
[A]: D


[Q]: [header] How to make a theremin [title] Learn the essential components of the theremin. [step] A theremin is basically a box with two antennas, one of which controls the pitch of the instrument, the other of which controls the volume. These antennas create electromagnetic fields which are " played " by manipulating them with the hands. <sep> (A) They are tuned and manipulated using the head and antenna of your instrument. [substeps] The operation of this type of theremin is complicated. (B) The theremin usually goes in a box, so this is where the crankoperators come in handy. [substeps] The theremin is designed to perform various tasks on your instrument, such as transferring notes from string to a circle. (C) Coils of tight-pack wire act as oscillators, producing signals fed into the antennae. While it may seem like spooky magic, the fields are created by relatively straightforward circuitry. (D) Depending on the instrument size and equipment, each would produce a different pitch. [substeps] For a theremin you may want to order a set of around.
[A]:
C