I believe the answer is B.
The total runners who began the marathon is 1000
<u>Explanation:</u>
Given:
Runners who completed the marathon = 90%
Men = 30%
Number of men completed the marathon = 270
Total runners who began the marathon = ?
Let the total runners be x
According to question:
Runners who completed the marathon = 
= 0.9x
and,

Solving further:

Therefore, total runners who began the marathon is 1000
Answer: Bierce uses a cynical tone to ridicule human behavior and society.
Explanation:
Answer:
It's important to keep the promises you make because it helps the other person trust you more.
Explanation:
When you make a promise with someone, they expect you to hold it and live up to it. If you break that promise, it weakens the mutual trust between you and the other person.