Tribals, Dikus and the vision of a golden age

State whether true or false:
(a) Jhum cultivators plough the land and sow seeds.
(b) Cocoons were bought from the Santhals and sold
by the traders at five times the purchase price.
(c) Birsa urged his followers to purify themselves,
give up drinking liquor and stop believing in
witchcraft and sorcery.
(d) The British wanted to preserve the tribal way of
life.