问题
It is vital to ________ to teenagers the simple fact that ________ the Internet will more or less do harm to both mental and physical health.
A:get across; being addicted to
B:get over; addicted to
C:get through; addicting to
D:get down; addicting themselves to;
B:get over; addicted to
C:get through; addicting to
D:get down; addicting themselves to;
正确答案是：
