[单项选择]

Text 4
It is hard to box against a southpaw, as Apollo Creed found out when he fought Rocky Balboa in the first of an interminable series of movies. While "Rocky" is fiction, the strategic advantage of being left-handed in a fight is very real, simply because most fight-handed people have little experience of fighting left-handers, but not vice versa.
The orthodox view of human handedness is that it is connected to the bilateral specialisation of the brain that has concentrated language-processing functions on the left side of that organ. Because, long ago in the evolutionary past, an ancestor of humans underwent a contortion that twisted its head around 180’ relative to its body, the left side of the brain controls the right side of the body, and vice versa. In humans, the left brain is usually dominant. And on average, left-handers are smaller and lighter than right-handers. That should ’put them at an evolutionary disadvantage. Spor
A. illustrate the relationship between left-handers and violence.
B. indicate causes for high criminal rate in traditional society.
C. compare murder rates in different tribal regions.
D. prove left-handers' inclination to commit crimes.