Studies of brain lateralization in animals have
purported to show that, whereas most human beings
are right-handed, about half of any given group of
animals will be “left-handed” (i.e., showing a
preference for their left limbs) and half will be
“right-handed.” This finding is suspect, however; it
has long been noted that dogs will almost always
“shake hands” with the right paw.
Which one of the following, if true, is the strongest
defense against the counterexample of dogs that
(A) Dogs are observed to scratch themselves with
the left leg as well as with the right leg.
(B) People who observe dogs “shaking hands” are
observing a behavior that dogs perform only
with a front paw.
(C) Left-handed people sometimes feel
inconvenienced or even stigmatized in a
“right-handed world,” but dogs face no
(D) Dogs that have lost a limb are able to
compensate for the loss, regardless of whether
the limb was lost from the right or left side.
(E) In learning to perform tricks, dogs are
influenced by the behavior of their trainers.