Sentence Correction

Competition in the mid nineteen century by large western farms gradually caused farmers in Pennsylvania to turn to livestock raising, but before it was predominantly grain-producing

A)Competition in the mid nineteen century by large western farms gradually caused farmers in Pennsylvania to turn to livestock raising, but before it was predominantly grain-producing

B)once predominantly a grain-producing state, competition in the mid nineteenth century from large western farms gradually was causing Pennsylvania's farmer to turn to live stock raising

C) Pennsylvania's farmers were gradually caused to turn to live stock raising by competition from large western farm in the mid-nineteenth century , but before that it was predominantly grain-producing state

D) it was once predominantly grain-producing, but competition in the mid-nineteenth century by large western farms was gradually causing Pennsylvania's farmers to turn to live stock raising.

E)Pennsylvania was once a predominantly grain-producing state, but competition in the mid-nineteenth century from large western farms gradually caused the state's farmers to turn to live stock raising

OAE

Guys ,

Can you pls explain each point .