Probably the strongest argument for using gene therapy and genetic enhancement appeals to the principle of: a. justice. b. double effect. c. beneficence. d. autonomy.

C. beneficence.D. autonomy.

The strongest argument for using gene therapy and genetic enhancement appeals to the principle of both beneficence and. Autonomy.
in beneficence the idea addressed is our actions should promote good and doing good is thought of as doing what is best for the patient. 

In autonomy, the person has the ability to make his or her own decisions.

That is true , instead try to have a sit down talk with them

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.