GWD 30-4

The three women, liberal activists who strongly support legislation in favor of civil rights and environmental protection, have consistently received labor’s unqualifying support.

1. have consistently received labor’s unqualifying support
2. are consistently receiving the unqualifying support of labor
3. have consistently received the unqualified support of labor
4. receive consistent and unqualified support by labor
5. are receiving consistent and unqualified support by labor

请问这里　unqualifying 与 unqualified 用法的区别。。。。？

那　A 和　C　选项如何区分呢？

还是简单的理解为，-ed 选项　优于　-ing 选项？