content area top Part 1 Solve. StartFraction z Over z minus 3 EndFraction plusStartFraction 5 Over z plus 3 EndFraction equalsStartFraction 18 Over z squared minus 9 EndFraction Question content area bottom Part 1 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution set is StartSet nothing EndSet . (Type an integer or a simplified fraction. Use a comma to separate answers as needed.) B. The solution set is StartSet z vertical line z not equals nothing EndSet . (Type an integer or a simplified fraction. Use a comma to separate answers as needed.) C. The solution set is empty set