Advanced farming techniques allow for a surplus in food which turn leads to?

i think the answer is the emergence of a artisan class

battle of saint-mihiel, (12–16 september 1918), allied victory and the first u.s.-led offensive in world war i. the allied attack against the saint-mihiel salient provided the americans with an opportunity to use their forces on the western front en masse.

explanation:

postive making stock not fall

negative   scams and   currpurt buisnesss practices