None of the attempts to specify the causes of crime explains why most of the people exposed to the alleged causes do not commit crimes and, conversely, why so many of those not so exposed have.
None of the attempts to specify the causes of crime explains why most of the people exposed to the alleged causes do not commit crimes and, conversely, why so many of those not so exposed have
(A) have
(B) has
(C) shall
(D) do
(E) could so的用法 不明白~~ why so many of those not so exposed do.