A) Bridge,Switch are layer-2 devices True
B) As, we can attach Bridge with Switches or Hubs number of devices decereas in Collision domainas our network divides (Refer this image) True
C) Yes, we can use bridge to connect LANs True
D) So, option-D is wrong
As, we can see in image if apply bridge it neither Expand nor Reduce Broadcast Domain False
(plz, correct me if I'm wrong)
For better understanding Switch, Bridge, Hub