Answer:
B, their number system.
Explanation:
The Arabic Number system (1,2,3,4,5,6- Numbers like these.) was created in India and later adopted by Arabs. The reason they call it Arabic, is because the Europeans were introduced to it from Arabs and not Indians, so they assumed Arabs made it.
That would be the states.
My Lai Massacre.....the U.S. killed between 347 and 504 unarmed civilians in South Vietnam on March 16, 1968.
Historians and archaeologists have three methods to reconstruct history: through primary sources, secondary sources and the oral history. Primary sources include the artifacts, videos and letters; while secondary sources are through books and reports. Oral history, on the other hand, are not written sources. They are passed on to generations through stories, songs, and may manifest in their customs and traditions.