Let U = StartSet b comma d comma g comma m comma p comma r comma v comma z EndSet A = StartSet b comma v comma z EndSet C = StartSet d comma g comma m comma p comma r EndSet Find Upper A union Upper C prime. Question content area bottom Part 1 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. Upper A union Upper C primeequalsStartSet nothing EndSet (Use a comma to separate answers as needed.) B. Upper A union Upper C prime is the empty set