Explanation:A most likely because different age groups will determine what they need to work on while the different type of support they may need may be different but a lot of kids in this organization may have the same thing they need to be supported on.The parent involvement can be distracting to some kids which will not help them in the future.So A is the best answer to support all the kids.
The duct system leads the semen through the penis towards the egg cells. The glands produce enzymes and proteins that strengthen the sperm and help it survive.
