What was a result of the Kansas-Nebraska act?
A. The addition of California to the nation as a slave state
B. The falling apart ox the Democratic Party
C. The falling apart of the Whig Party
D. The addition of Missouri to the nation as a free state

True blindness may be caused by trauma to the eye, severe conjunctivitis due to  ibr (infectious bovine rhinoceros) or pink eye or other infections, leptospirosis, lead poisoning, selenium toxicity, fungal infections, vitamin a  deficiencies, rabies, vitamin b12 deficiency, neoplastic of the orbit or  conjunctiva, cataracts, congenital malformations, etc.