Which sentence contains proper punctuation?

In twelve years a slave, northup realizes he cannot trust anyone after his kidnapping except hamilton and brown god the physician the women who gave him drink

Experiments were conducted to try to teach chimpanzees sign language

What does robert frost accomplish by using blank verse in his poems he mimics the sound of natural speech. he establishes a sense of formality. he establishes order through rhyme. he makes his poems original by breaking the rules.