Which of the following is the best example of an inference?

"that was the second point gained."
"the new year of 1854 found slavery excluded from more than half the statesby state constitutions and from most of the national territory by congressional prohibition."
"a house divided against itself cannot stand."
"we cannot absolutely know that all these exact adaptations are the result of preconcert. find it impossible not to believe that [these men] all understood one another from the beginning."