Because you’re the man I like the man
Answer
You the reason why
B is the answer
Wave of invader swept across Western Europe<span> (Vikings, Franks, Goths, and Huns) trade slowed down to a trickle (people became more isolated) towns became empty, and classic learning just stopped.</span>
The answer is: to act as a ceremonial role within the Senate.
The phrase 'Pro Tempore' is a latin language with the meaning of 'for the time being'. President pro tempore of the senate only elected as a ceremonial role when the actual presiding officer of the senates is unable to attend the meeting/conference.
The prime minister is the leader of the party that wins the most seats in general