Definition: 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".
Input: [header] How to survive on a runaway horse [title] Regain your balance. [step] Whether your horse has started racing the others in the ride or has been suddenly spooked, you need balance before you can think about slowing your horse down properly. Balance in the saddle will help to assure you are not thrown off. <sep> (A) Instead, lean on the back of the saddle as you re-horse. [substeps] Sit up on your stirrups and close your legs. (B) To do this with a horse : [substeps] Grip both stirrups. You can move the reins back and forth in each hand if you would like but your riding hand will be the primary control. (C) Get low to the ground, turn sharply and enjoy your ride! [title] Take into account the terrain. [step] Depending on where you are and if you are riding a slower horse, you will need to monitor your physical fitness. (D) [substeps] If you have lost your stirrups, do your best to get them back. Having your feet planted in the stirrups helps with both balance and control of the horse.
Output:
D