It is a worrying situation and some areas have put ___ in pl

It is a worrying situation and some areas have put ___ in place to protect special fish.
A measures B rules C up
可是put rules in place不是有“立法，订规章制度”的意思？我查了下，两个短语都有。C肯定不对，A、B从句子意思上看似乎两个都说的通。
“Some fishing methods are actually cleaning out the ocean,” said Dave Schofield,the
manager of the aquarium’s ocean health program.“The fishermen throw them away like　 rubbish.It is a worrying situation and some areas have put ___ in place to protect these special fish.”
这是文章的最后一句，上文说的是既没提方法，也没提法规。从上下文看那个选项更好？