So do you need the answer tonight? Or can I give it to you tomorrow morning because I’m kinda tired but I can give it to you tomorrow :)
It was the use of assembly lines
The US role played in the Vietnam War was C. The US became involved because they feared that other countries would fall to communism like dominoes. The Vietnam War was the longest war fought by the US in its history until the War in Afghanistan surpassed it recently. Involvement began slowly at first but gradually ramped up resulting in a widespread feeling of war weariness in the US where activists began to actively oppose war efforts and speak out against involvement on the whole.
the Sherman antitrust act in 1980 made trust and monopolies illegal.
B) The European allies were still at war with Great Britain