Answer:
b.The Nazis said that they would offer a pardon to anyone who had returned illegally.
The answer would be Pollution. Pollution is an example of a negative externality, which refer to various factors that resulted from company's productivity. One of the common example of this is the air pollution , which will bring harm to the environment
This is probably because scientific journals get cross-referenced and peer-reviewed by other mainstream scientific organizations whereas a regular webpage can tell you just about anything without anything to back it up. Their credibility isn't as high.
