This question has options. Select from options: Read this fact: "a pollutions standard is a kind of standard for reducing pollutants emitted by factories"

Now answer this question: "A pollutions standard is something which"

Available options:
a). will hopefully limit the amount of damage done to the environment by large producers;
b). a standard that gets applied to every person;
c). a way to get factories to make more product;
d). the best way to reduce poisoning the trees in Michigan;
a).