Which of the following sentences should definitely be included in a summary of the text?

Safety is clearly an important factor, but it is unlikely to be a decisive one.

The critics' last argument - that opening the door to repairing genetic disorders will also leave the way open for eugenics - is the most worrying

Likewise, as valid an ethical concern as fairness may be, it has never held back the adoption of technology.

As justifiable as some of the ethical concerns may be, there are simply too many benefits to be gained from preventing hereditary diseases.