Means that each individual involved in incident operations will be assigned to only one supervisor.
a. supervisor authority
b. unity of command
c. span of control
d. unified command

Generally speaking, a "D. Unified Command" means that each individual involved in incident operations will be assigned to only one supervisor, since the power in this case is "unified". 

How  did spanish  power increaseunder charles  v and philip ii? in 1519,charles  v inherited a huge empire. he became king of  spain  and was also the heir to the hapsburg empire. during his 42-year reign, philip worked to expand  spanish  influence, strengthen the catholic church, and make his own power absolute. hope this !