What might make one person’s story more believable than another person’s?

The arguments used and, if possible, some evidence the person found and that might help.

Explanation:

When you ally strong arguments with the evidence you can support your story and make it more believable because everyone will look at you and your story and see that you brought something physical, and attest that it's true. Sometimes, just the physical evidence or anything related to the story that can be seen and touch is enough. If the evidence is impossible, so create strong arguments supported by research and experience.  

answer: the risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation: