Why Did the Progeny in August Weismann's Experiment Continue to Have

Why did the progeny in August Weismann's experiment continue to have tails,even though their parents' tails had been removed?

A) All necessary genetic material is present in sex cells.
B) The mice procreated prior to having their tails removed.
C) Mice tails can regenerate.
D) Tails don't have genetic material.
E) This is still a mystery we don't understand.