The correct answer is "HIV/AIDS".
AIDS (Auto Immune Deficiency Syndrome) is a disease that attacks the human organisms autoimmune system, making it unable to perform the task of fighting bacteria and viruses efficiently. This disease is caused by HIV, which is a retrovirus that lives off the human body's immune system.
Efforts made towards the understanding of retroviruses are key in order to unlock the cure against AIDS.
It was Christopher Columbus
The Person Who discovered America
hope this helped
on e202 the answer is The Japanese will treat the American people with respect and kindness.