Alisha began the introduction of her speech by saying: have you ever been knocked down so hard by life that you didn't feel you'd ever get back up? this has happened to me many times, the first being when i tried to ride a bicycle when i was very young. today i want to discuss with you some basic strategies for coping with life's challenges. what kind of supporting material did alisha use in her introduction? a. expert testimonyb. brief examplec. metaphord. hypothetical examplee. simile