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 hurdle [title] Stretch. [step] If you don't stretch, you can become seriously injured. ( pulling hamstrings are common ) [title] Run a few practice hurdles. <sep> (A) [step] One jumper runs out of breath pretty quickly. In this case you will need to keep the speed up and relax to improve your technique. (B) [step] Make sure you have a sufficiently good upper body. If that's not possible, try to slow down and relax. (C) [step] Make sure you have your lead and trail legs figured out before the race starts. The lead leg is the leg that goes over the hurdle extended before your body. (D) [step] Build up and stretch your right and left foot until your hamstrings are strong. [title] Tap the bell lightly and roll up toward your right.
A:
C