The author says "...its going to be a war of exhaustion." Explain how trench warfare affects soldiers and could lead to "a war of exhaustion".

Trench warfare can lead to a war of exhaustion because many of the soldiers have to live in the trenches which had disease spreading around, rats eating the food, and the constant bombardment of artillery shells non stop for days. This is why trecnh warfare would lead to a war of exhaustion.

c. free trade can lead to low pay for workers in poorer countries.