Which of the following was responsible for the increase in prices of food grains in Britain, in the late 18th century?
Fill in the blanks:
(a) Growers of woad in Europe saw ___________ as a crop which would provide competition to their earnings.
(b) The demand for indigo increased in the late-eighteenth-century Britain because of ____________.
(c) The international demand for indigo was affected by the discovery of ___________.
(d) The Champaran movement was against ______________.