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 perform the heimlich maneuver on yourself [title] Try to cough out the foreign object. [step] If you feel like you have something caught in your throat, you should try to cough it out. If you can cough forcefully enough to get it out, then you should not have to perform the heimlich maneuver. <sep> (A) [substeps] [title] Draw a circle with the rubber tip pointed at the ground. [step] Sitting upright, draw an oval with the rubber tip pointed horizontally. (B) Instead, simply open your throat and force the foreign object out. Coughing can help relieve the pain and swelling caused by infection. (C) If you cannot get the object out by coughing and are struggling for air, you need to act quickly, especially if you are alone. [substeps] You need to expel the obstruction before you lose consciousness. (D) Cough up a large amount of phlegm and clear your throat by coughing it out. This will allow the foreign object to escape, and decrease your chances of attempting to discreetly remove the foreign object.
C