During OSPF adjacency formation, in which state is a router in when it is negotiating to be in charge of the database synchronization process?()<br /> <img src="https://nimg.ppkao.com/2018-08/gelingxia/20180808174640455.jpg?sign=4c1c4a0e76e195e9cec9bf2deeee3143&t=62d2018c" />
A、A
B、B
C、C
D、D