Answer:
C: If you get your mouth washed out with soap, then you swore.
Step-by-step explanation:
Assuming that if you occur in an action: swearing, will bring the consequence of having your mouth washed out with soap. (If/then). It is true to conclude that the reason you get your mouth washed out with soap is because you swore. "If you do this, then that will happen; that happened, then you did it."