Answer:
New forms of transportation such as the steamboat and the railroad helped the nation expand trade. Meanwhile, innovations such as the modern assembly line and electric light bulb revolutionized both business and personal life
Explanation:
The correct answer is A) The Nazis built huge ovens to burn the bodies.
The reason why there was little evidence of the 120,000 people who had been killed at Babi Yar was that the Nazis built huge ovens to burn the bodies.
This was another chapter of the many atrocities committed by the Nazi Germans in times of Adolph Hitler.
On September 29, 1941, Hitler ordered to kill more than 30,000 Jewish people in Babi Yar in Kiev, Ukraine. Among the victims, there were men, women, and infants.
The killing continued after that massacre until 1943. To try to hide the evidence, Nazi soldiers tried to burn the bodies in pyres but local people witnessed the action.