Answer:
He used an old culture of germs.
Explanation:
The chickens did not become ill. Pasteur reasoned the factor that made the bacteria less deadly was exposure to oxygen.
I would say #3, a deeply personal account of a true event.
The idea of species changing overtime explains Darwin's observation about the Galapagos Islands finches.
Answer:
The Ordinance of Nullification
Explanation:
In November 1832 South Carolina adopted the Ordinance of Nullification, declaring the tariffs null, void, and nonbinding in the state. U.S. Pres. Andrew Jackson responded in December by issuing a proclamation that asserted the supremacy of the federal government.