问题详情

What had archaeologists known about Viking recycling before the weapon recycling center was discovered？
A．The Vikings recycled metal and other materials for daily use.
B．The Vikings only recycled metals because they were precious.
C．The Vikings were the only people at that time who used alloys in reprocessing weapons.
D．Recycling centers were usually found behind the battlefields.此题为多项选择题。请帮忙给出正确答案和分析，谢谢！