What is the main idea of this excerpt?
Mad cow disease ended because of government bans
on feeding cows certain foods, but people were angry
that governments did not act sooner.
Mad cow disease was originally caused when
governments allowed for cows' food sources to be
contaminated, so people were angry at their leaders.
Both farmers and customers had been aware of mad
cow disease, but they did not think their governments
should have done anything to stop it.
Both farmers and customers protested to prevent their
governments from interfering with the farming and
selling of cows and meat.