Due to the fact that it is a historical document. Just like the liberty bell isn't repaired. The fracture in the bell is historic as is the document.
The quantity of a product that will be produced and sold at a specific price is the quantity supplied.
Impeding - to delay or prevent by obstructing it/them.
so your answer is B. Obstructing; slowing down.
I could be because the flavor
Trade spreads ideas and culture because it involves people moving from place to place around the world as they trade. As they move, they (and the people they meet) come into contact with new ideas and cultural practices