What is the main function of the construction column which is set in the multi-storey masonry building and connected with the ring beam in seismic design? ( )

A、Improvingtheoverallbendingbearingcapacityofbuildings;
B、Increasetheductilityandintegrityofthebuildingandpreventitfromsuddencollapse;
C、Improvingthehorizontalshearcapacityofwall;
D、Improvingthestiffnessofdiaphragm