What’s exposition in literature

about the letter or who wrote the letter

it b =a chorus ik for a fact

the answer would either be a or d

i hope this

the development of trade during the middle age increased to the change given in the agriculture, which gave money, industry and markets a bigger importance in economy. the agriculture production was more than the consumption, which meant the creation of wider markets out of the areas. besides, with the end of multiple wars, the population increased and new trade routes were created.