Which group,founded in the wake of the Easter Sunday massacre,became the driving force behind the Irish independence movement?

A) the Irish Republican Army
B) the Ulster Resistance
C) the Black and Tans
D) the Royal Ulster Constabulary
E) the Ulster Volunteer Force

Easter Sunday Massacre

A tragic and violent event, though without a widely recognized historical context matching this exact term, possibly referring to specific incidents of violence occurring on Easter Sunday in various times and locations.

Irish Independence

The historical process through which Ireland gained sovereignty from the United Kingdom, culminating in the establishment of the Irish Free State in 1922.