If the Human Transplant Patient in the Figure Below Needs

If the human transplant patient in the figure below needs a new kidney because of a genetic mutation that has made her own kidneys nonfunctional,what additional step would need to happen to produce a functional kidney for this patient?

A) The mutation that resulted in her nonfunctional kidneys should be edited or corrected before her stem cells are inserted into the pig embryo.
B) Mutated kidney genes can be easily corrected after the pig embryo begins to grow.
C) Nothing else needs to be done. The kidney genes in the patient's stem cells will have autocorrected themselves already.
D) The mutated kidney genes should be corrected after the human kidney is harvested from the pig and before it is implanted in the human.