Performer a once commented that he was always extremely nervous before a performance, but as soon as he started his activity he became calm and was able to perform well. performer b was also nervous before performances, but he remained nervous during performances and retired from performing in public for over a decade. evaluate these statements and decide which one best describes the differences between a and b. a.for both performers a and b, the parasympathetic nervous system was dominant before performances. for performer a, the sympathetic nervous system became dominant while for b, the parasympathetic nervous system retained dominance. b. for both performers a and b, the parasympathetic nervous system was dominant before performances. for performer a, the parasympathetic nervous system retained dominance while for b, the parasympathetic nervous system became dominant. c. for both performers a and b, the sympathetic nervous system was dominant before performances. for performer b, the parasympathetic nervous system became dominant while for a, the sympathetic nervous system became dominant. d. for both performers a and b, the sympathetic nervous system was dominant before performances. for performer a, the parasympathetic nervous system became dominant while for b, the sympathetic nervous system retained dominance.