I think it's the telephone because it allows people to communicate better and customers or workers don't have to walk up to everyone and disturb them. You may elaborate more on this with your own opinion
I think the answer should be C
Answer:
They allowed American Indians to keep their own land. They were allowed to force American Indians to work. They were expected to protect and teach American Indians.
Explanation:
The Encomenderos were granted with an amount of labor, but they didn't control the land or the American Indians. The leaders of the communities had to decide who had to work as payment for the encomienda.
The encomendero used the labor for different ends, but mostly it was used for the gold and silver mines. In exchange for this labor, the encomenderos were responsible for teaching the Christian faith and protect the American Indians from danger.
Psycho-Physics as a discipline within the psychology began with the work Elemente de Psychophysics ( Elements Of Psychophysics ), written by German philosopher and physicist Gustav theodor Fechner. He actually aimed at developing a method that relates mind ( psych ) to matter ( physics ). So Psychophysics is the scientific study of the relation between stimulus and sensation.