A． They made a raid on a public housing estate in west London on July 29.
B． They attempted to blow up the London transit system.
C． They killed 56 people in a series of bombings against subway stations.
D． They set fire to several trains and buses in London.

A． Because there was a shortage of men and women in the area.
B． Because mining communities were then separated from the rest of the country.
C． Because the mining runnels were too low for the horses to pull trucks of coal through.
D． Because the mine owners were unable to make men and women work longer hours and stay down the mine all day.