Which Is the Best Standard-Form Representation of the Following Argument

Which is the best standard-form representation of the following Argument from Analogy?
Someday we may be able to use genetic manipulation to alter a fetus's genetic code so that it will live a better life. For instance, suppose that one day it is possible for people to increase their child's healthy life-span well beyond the current average. Suppose we have developed the ability to do this safely, with no risk of adverse side-effects for the child. In that situation, parents who can afford it would be morally obligated to use genetic manipulation to extend their child's health span. After all, parents are morally obligated to provide healthy food to their children, because that increases the child's chances for living a longer, healthier life. Genetic manipulation to increase a child's healthy life-span is no different.

A) 1) Parents are morally obligated to provide healthy food to their children.
2) Parents are morally obligated to modify their fetus's genetic code.
So, parents are morally obligated to provide their child with the best possible future.
B) 1) Parents are morally obligated to modify their fetus's genetic code.
2) Genetically modifying a fetus's genetic code is relevantly similar to providing a child with healthy food.
So, parents are morally obligated to provide healthy food to their children.
C) 1) Parents are morally obligated to provide their child with the best possible future.
2) Genetically modifying a fetus's genetic code provides it with the best possible future.
So, parents are morally obligated to modify their fetus's genetic code.
D) 1) Parents are morally obligated to provide healthy food to their children.
2) Genetically modifying a fetus's genetic code is relevantly similar to providing a child with healthy food.
So, parents are morally obligated to modify their fetus's genetic code.