Answer: The Europeans carried a hidden enemy to the Indians. (diseases)
Explanation: The Native people of America had no immune support for the diseases that the European explorers and well as the colonist brought to them. Diseases such as smallpox, influenza, measles, and chickenpox was very deadly to American Indians.
I think A)People had more time for face to face contact
The response by the professor that is most accurate is: Autoimmune disease against hematopoiesis by activated cytotoxic T (Tc) cells.
<h3>What is Aplastic anemia?</h3>
Aplastic anemia occur when the affected person body is not producing sufficient blood cells or white blood cell and this tend to occur when the person has bone marrow disorder.
Hence, the response by the professor is most correct is that Autoimmune disease against hematopoiesis by activated cytotoxic T (Tc) cells triggers aplastic anemia .
Learn more about Aplastic anemia here:brainly.com/question/8063990
#SPJ1
The right option is the US dollar has become stronger. When this occurs, purchase power increases if compared to foreign goods and services, enabling US citizens to benefit from those. Certainly, tourist sites getting crowded and dirty is a risk that must counted on, perhaps not the ideal situation for anyone.