Pregnancy is not a disease. Pregnancy is a normal condition of the female body. Abortion is a violence inflicted upon the mother's body, as well as a direct assault upon the pre-born baby. Killing the child for the crime of its father is not an acceptable American legal position. Children conceived through incest should not automatically be presumed to have developmental problems.
Adoption is the best option.
It changes an unwanted pregnancy into a wanted child. It is quite permissible to end your talk right after you have presented the third question and discussed the semantics of abortion. The discussion should be opened up for questions at this point. Let the audience tell you where they are in their level of understanding through the questions they will ask. If you do not know the answer to a particular question, do not guess at it.