In the developing chick vertebral limb bud,the zone of polarizing activity (ZPA)organizes a pattern along the anteroposterior axis.Transplantation of the ZPA from a posterior to anterior position:
A)causes no change in development. B)induces extra digits with reverse polarity. C)induces extra digits with the same polarity. D)induces extra limbs. E)None of the answer options are correct.