How do you do this please answer?

Answer quickly! correct answers only! how did an agricultural surplus relate to expanded trade during the high middle ages? a)trade increased because surplus crops could be traded. b)trade decreased because surplus crops were needed to feed local populations. c)trade decreased because surplus crops led to an oversupply of grains that could not be sold. d)trade increased regionally but decreased globally because trade networks had shrunk.

What is it called when countries build lots of weapons to store and them in case of a war?

What is grievance 28 on the declaration of independence explained in simpler words? plz