A unique property of stem cells is that they can divide and differentiate, meaning they can become specialized cells. Stem cells can specialize to gain a specific function, for example a stem cell can become a liver cell.
Because after the second world war, there was a surge of immigration that flowed to the United Staes. There was also a substantial amount of people who were intelectuals that were flocking to this country. All of this led, of course, to dramatic changes following World War 2.
The answer is c as many abolitionists were jailed
