Q39:
In 2000, a mere two dozen products accounted for half the increase in spending on prescription drugs, a phenomenon that is explained not just because of more expensive drugs but by the fact that doctors are writing many more prescriptions for higher-cost drugs.
A.a phenomenon that is explained not just because of more expensive drugs but by the fact that doctors are writing
B.a phenomenon that is explained not just by the fact that drugs are becoming more expensive but also by the fact that doctors are writing
C.a phenomenon occurring not just because of drugs that are becoming more expensive but because of doctors having also written
D.which occurred not just because drugs are becoming more expensive but doctors are also writing
E.which occurred not just because of more expensive drugs but because doctors have also written
本題答案B,你看厲害吧,有能人可以給解釋就最好啦
我是ABC 選一個,看你囉