The correct options are
A Mill workers in Ahmedabad went on a strike demanding increase in wage.
B Kheda community stood against the hike in taxes.
C Farmers in Champaran went against the European farmers demand to grow indigo crops.
European planters had been forcing native farmers in Champaran district of Bihar to cultivate indigo. Gandhi stood with the farmers and this protest was known as the first Civil Disobedience movement. The British government gave in to the demands of the farmers. In another incident, mill workers in Ahmedabad demanded a hike in wage, Gandhi helped the workers and the owners come to common terms. Bombay presidency levied higher taxes on land. Kheda community protested over this hike, and they got support from Gandhi. Finally, the British government gave in to the demands of people. This is how Gandhi popularised Satyagraha.