A is wrong.
B is correct.
C is true but magnetic monopoles have been predicted in theory, but never found in practice.
This is a transitive trust which is a two-way correlation routinely made among parent and child domains in a microsoft active directory forest and when a new domain is produced, it bonds resources with its parent domain by evasion in which allowing an valid user to access resources in together the child and parent.
C: bar graph
bar graphs are used to track changes over time, so I would say that C is your best bet
My life career in computer science