The answer is A. a president pro tem.
The President pro tempore of the United States Senate is the second-highest-ranking official of the United States Senate, who presides over the chamber in the absence of the vice president.
Here are some examples of positive and negative self talk. The positive statements are examples of the kinds of things you need to say to yourself. ... Positive Statement – “I accept the things that I can't change, and change the things I can.” Negative Statement – “Nothing positive is going to come out of this situation.
- https://budbilanich.com/positive-self-talk-and-success/