To make more profit, expand in mercantilism, and gain more raw materials for manufactured goods :)
Weather, local tribes such as local Indians, and viruses
Answer:
Correct answer is C. The signing of the Burlingame Treaty
Explanation:
A is not correct as it refers to rebellion in China against ruling class.
B is not correct as this Act actually restricted immigration.
C is correct because when it was signed in 1868 it actually approved mutual immigration policy between China and USA.
D is not correct as it refers more to open trade between these countries.
Just a couple things
diseases that affect them during pregnancy
birthing troubles
possibly cultural or religious traditions that would make it hard for them to survive.
Assuming that you're talking about Harriet tubman the abolitionist,
Back then , she experienced some sort of illness on her brain.
She really need some money to get into brain surgery procedure
