Detailed 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".
Q: [header] How to play a glissando on the flute [title] Warm up as you normally would. [title] Work on your scales, especially chromatic scales. [title] Examine the music. <sep> (A) [step] A glissando is indicated by a squiggly line traveling downwards or upwards diagonally. See what note the fall starts on and what it ends on. (B) [step] How are they used and what is inside the song? Observe the song and make sure it's good! [title] Come up with another melody. [step] That way, you can try your hand at making combinations of three different melody for a unique melody. (C) [step] Some percussion is more complex then others. Have a parent practice them for you, with cost greatly concentrated, which you can watch in the photo. (D) [step] Determine if you have raised your emotions in addition to singing. Being thirsty or bored are your best bets, as these can bring about quicker playing.
A:
A