How did the use of metal tools most affect the development of civilizations during the Neolithic Age?

a
by allowing for the development of long-distance trade
b
by improving the transportation of goods between regions
c
by expanding the productivity of agricultural labor
d
by increasing dependence on hunting and gathering

aby allowing for the development of long-distance trade

figure it out loser harabe

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.