WILL MARK BRAINLIEST look at the picture

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.

The american public was excited by the invention of the railroad system. true false

What are the relation of community dynamics and community action to applied social sciences?