How Did August Weismann's Mice Disprove the Idea of Pangenesis

How did August Weismann's mice disprove the idea of pangenesis?

A) Parent mice without tails produced offspring without tails.
B) Mouse offspring looked exactly like their parents.
C) Parent mice without tails produced offspring with normal tails.
D) It was shown to be impossible to grow mice from seeds.
E) Short tailed mice produced long tailed offspring.