The idea of farming took shape in many areas of the world. how do we know this?
a) archaeologists have excavated different regions with findings of very early agriculture.
b) ancient records from different regions show agricultural and animal domestication drawings.
c)recent languages have ancient words for domesticated animals and plants.
d)carbon dating of seeds reveals ancient genetic structures.

I  believe the answer is: A. Archaeologists have excavated different regions with findings of very early agriculture.

The finding includes things such as tools used for agricultural process ( sickle, hooe, etc), agricultural land land site, and irrigation path that has been as pathways for watering the plants. Each regions had different method of agriculture depending on their climate and geographical features around them.

because the vietnam war was fought in an especially brutal and untraditional way