What river valley civilization was most isolated from invasion and contact with other civilizations

China was the most isolated of the River Valleys because of mountains & deserts, which made up 2/3 of China's land, and also because of water to the east. Writing that became a beautiful art form during the Shang Dynasty in China.

Explanation:

China was the most isolated of the River Valleys because of mountains & deserts, which made up 2/3 of China's land, and also because of water to the east. Writing that became a beautiful art form during the Shang Dynasty in China.

explanation:

there are two statements that are incorrect.

1. the marshall plan was a lend lease program. it was an economic plan that europe redevelop itself after wwii.

2. einstein didn't really do anything to further the allied cause in building the bomb. he merely sent a letter to fdr telling him (in 1939) that if the united states entered the war, perhaps it would be wise to build the bomb before germany did. i would say this answer is incorrect, but when america entered the war 2 years later, fdr thought it might be a good idea to take einstein's advice.

the 4th choice is definitely so wrong that is likely the single answer of this question

religion was the center of there society they practiced human sacrifices and which they believed kept there god strong and that he would keep bad guys away hope this