Teacher: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".
Teacher: Now, understand the problem? Solve this instance: [header] How to play " happy birthday " on the piano [title] Locate middle c on the keyboard. [title] Place both your thumbs (right and left) on middle c, without playing a sound. [title] Play your fourth finger on your left hand twice, the g note. <sep> (A) [title] Repeat steps 3-5 on the piano, then move your thumb toward left c twice. [title] This will sound silly at first, but can make perfect great music for the piano. (B) [step] This time, this will make the chord " happy birthday ". [title] Place the first finger on c, then press the d key to turn right. (C) [title] Then quickly play your third finger down afterwards, a note. [title] After you have done that, play your fourth finger again (g). (D) [step] This key is located underneath the b string on the right-hand d gb. [title] The other key is the fifth note on the d string on the left-hand g.
Student:
C