The correct option is 'C'.
Option A is true, Catholic Christians in Northern Ireland have been historically disadvantaged economically and are more likely to live in poverty than Protestants.
Option B is true, Catholics have experienced a history of discrimination and inequality in Northern Ireland, particularly in the areas of housing, employment, and political representation.
Option C is false, Catholics and Protestants have not lived peacefully with each other in Northern Ireland, there has been a long history of sectarian conflict, violence and political tension between the two communities.
Option D is false, as all the options are not true as C is false.
It's worth noting that, the history of Northern Ireland is complex and multifaceted, and it's important to remember that not all Catholics or Protestants have the same experiences or perspectives.