The vice president presides over the senate,but president pro tempore is the highest ranking senator.The president pro tempore preside senate only the vice president is absent.The other junior senators preside the senate when the president and vice president are absent
I think it D.
i hope this helped!
There was no railroad mileage in the pacific region in 1850 because of the lack of people,they could not get their supplies to the location.
Hope this helps :)
My guess is <span>B: Serf->Lords->King->Knight
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