In the Future, Which Will Likely Be the Best Solution

In the future, which will likely be the best solution to the "external/internal" and genetic/environment causation question?

A) in view of the recent mapping of the human genome, come down on the side of genetics
B) end the debate: it is not possible or meaningful to decide
C) come down on the side of environment (nurture) because that is what research results suggest
D) suspend judgment until there is more evidence bearing on the issue