Roger williams was banished from the massachusetts bay colony because he

a. no longer believed in god.
b. refused to follow the sabbath
c. was friendly to the native americans
d. argued for the separation of church and state.

  Roger Williams was puritan leader, theologian and author who was born in London in 1603. He grew up in an era of religious conflict and persecution and by the time he finished university studies he had embraced the idea of freedom of worship, dangerous in those times. He became a puritan minister and he argued for the separation of church and state. His separatism ideas as well as his freedom of worship position forced him to fled England to avoid the arrest.

  He arrived to Boston on 1630 but as soon as his radical ideas where spread  he moved to Plymouth that was more hospitable to those with separatist ideas. After two years in there he accepted a call from a church in Salem.

  His interpretation of the Bible was against the common beliefs of the others ministers. Williams did not believe that the Bible demanded punishment of religious heretics. This was a serious threat to the authority of the colonial society because they depend on the Bible as a life guide. Apart from his position towards the Bible he was one of the few Englishman to sympathize with the native american population.

  The colonist leaders along with the English authorities saw him as a serious threat to the "status quo" in the colony, described him as a spreader of "Satan´s policy" and forced him out of the colony under the conviction of sedition and heresy. He and part of his congregation took refuge with the Narrangansett Indians whose chief sold land to Williams where they stablished a new settlement and named it Providence.

  So to be more clear the right answer I believe is option D, he argued for the separation of church and state. I hope that this answer help you. Regards

a) the colonists began to see themselves as different from people in britain.