The event that led to defeat at Waterloo was:
B.a Russian army strikes the final blow at the battle of Waterloo
Explanation:
The Russian army's final strike at Waterloo against the immortal guards of Napoleon which were supposed to be the old guard that never fell and then they were routed from the war leaving Napoleon himself defenseless.
This route was the final blow at the end of Waterloo's battle dealt by the Russians against Napoleon's forces and it resulted in an utter defeat on his side which Napoleon has rarely seen in his life's entire campaigns.
The southern factories were built to serve the interest of farmers because these industries were agricultural based which implies that there would be more benefit in having related industries in the region. This would help in cutting costs such as transport which meant higher benefits for farmers.
By eliminating competition to control prices