The plague of 1348 is most significant because a. it eradicated the rat population in london. b. many fine pieces of literature were produced as a result. c. it claimed the lives of almost one third of england's population. d. the field of medicine was able to develop many new research techniques.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.