Because this area has a high rate of crime and unemployment, there are only people moving out.
【正确答案】 C
【答案解析】解析:词义辨析。rate几率,比率,速度,费用;而B.incident事件,事变;C.incidence发生,影响(方式),影响范围,影响程度,发生率;initiative主动性;因此C为答案。