Please I need help ASAP

Religious conflict in northern ireland started with a) cultural differences resulting from viking invasions around 800 b) england’s split from the catholic church in the 1500s c) rebellions in ireland between 1916 and 1921 d) the norman invasion of england in 1066

Which of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?

Who developed the theory of plate tectonics?