The concerns regarding gene therapy as a viable alternative to traditional methods of treating diseases or inherited disorders could encompass various aspects. Based on the provided options, let's analyze each one:
A. The side effects and/or risks of gene therapy are still relatively unknown. - This is a valid concern as gene therapy is a newer and evolving field, and its long-term effects are not fully understood.
B. Altering the genetic make-up of an unborn child would be in effect, playing God. - This ethical concern highlights the moral implications of modifying human genetics, which makes it a relevant concern.
C. Who would regulate the practice; government, doctors, big pharma, religious groups? - Questions of regulation and oversight are significant concerns in the implementation of gene therapy, as they directly affect safety, access, and ethical standards.
D. When alternative treatments are viewed as effective and relatively free of side-effects, should gene therapy be considered? - This concern reflects the comparative effectiveness of gene therapy against established treatments and the need for careful consideration of when to employ gene therapy.
Therefore, all these options can represent possible concerns surrounding gene therapy.
The answer is: All could be possible concerns.