Simone is doing research with head injury victims who are in physical therapy. she believes that the addition of music to their physical therapy routine will enable them to better coordinate their motor skills. she randomizes the patients into two groups. group a will get the regular physical therapy sessions. group b will get the identical physical therapy sessions while listening to music. what is the independent variable?

Hegyes was driving her car when it was negligently struck by a unjian enterprises truck. she was injured, and an implant was placed in her body to counteract the injuries. she sued unjian, and the case was settled. two years later hegyes became pregnant. the growing fetus pressed against the implant, making it necessary for her doctor to deliver the child 51 days prematurely by cesarean section. because of its premature birth, the child had a breathing handicap. suit was brought against unjian enterprises for the harm sustained by the child. was the defendant liable?