PT 65 S4 Q23

Biologist: Researchers believe that dogs are thedescendants of domesticated ... ...

Which one of the following principles underlies the biologist’s argument?
(A) If one breed of dog is descended from wolves that were domesticated more recently than were the wolves from which most other breeds of dog are descended, the former breed may be more closely related to wolves than those other breeds are.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Dec 2011 LSAT (PT 65): Logical Reasoning B