ANSWER QUICK PLEASE!! which statement best describes harriet tubman?

A. She started an abolitionist newspaper that influenced many politicans.

B. She wrote a novel that showed many americans the horrors of slavery.

C. She led slave rebellions on plantations throughout the south.

D. She risked her life many times t help slaves escape to freedom

Answer is in the photo. I can only upload it to a file hosting service. link below!

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explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

hope this .

plz give me brainliest!

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.