It wants you to say what your worst studying condition was and what was the best studying condition was for you.
Once you do that, you say what the outcome for them both was.
Hope this helped/was what you wanted. If it was not, then i am sorry..
Answer:
Europeans carried a hidden enemy to the Indians: new diseases. Native peoples of America had no immunity to the diseases that European explorers and colonists brought with them. Diseases such as smallpox, influenza, measles, and even chicken pox proved deadly to American Indians.
I have great disdain for culture. Hoped I helped. :)
