Given the task definition and input, reply with output. 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".

[header] How to do a reverse lunge [title] Stand up straight in front of a mirror. [step] Keep your shoulders back and your hands resting at your sides. [title] Take a big step backwards with your left foot. <sep> (A) [step] Push off with your right foot and bring your left knee forward. If you are right footed, this step should backflip you on your non-balanced foot. (B) [step] Pay attention to how your upper leg moves with you. The lunge time will come much slower if you are starting with the right foot, and will take longer if you are starting with the left. (C) [step] You should now be standing with your feet apart. [title] Lower your hips to the floor until your front (right) knee forms a 90-degree angle. (D) [step] When you are in a lunge position, take another large step back and to the right. You should now be facing one another and the back legs should be oriented towards you so your feet are straight.
C