Adance studio has 40 nine-year-old children sign-up for ballet class. the studio owner decides to divide the children into two nine-year-old ballet classes: class alpha and class beta. if the studio owner wants each child to have a fair chance of being placed in either class, which of the following describes a method that cannot be used to the studio owner place the children? a. using a random number generator, assign each child a number, eliminating any duplicate numbers. assign each child with an even number to class alpha, and assign each child with an odd number to class beta. b. using a random number generator, assign each child a number, eliminating any duplicate numbers. after each child is assigned a number, list the assigned numbers in ascending order. assign the children with the first 20 numbers on the ascending list to class alpha, and assign the children with the last 20 numbers on the ascending list to class beta. c. randomly select a chip from a bucket containing 40 chips, which are each uniquely labeled with a child's name. assign each child whose name is labeled on the first 20 chips drawn in class alpha, and assign the remaining 20 children to class beta. d. all methods can be used to the studio owner make a fair decision.