问题：
[单选题] NAC's（Network Access Control）role is to restrict network access to only compliant endpoints and（ ）users.However,NAC is not a complete LAN（ ）solution;additional proactive and（请作答此空）security measures mu
A、constructive
B、reductive
C、reactive
D、productive
参考答案：
C、reactive
● 参考解析
