I agree with the person above...
In Chapter 7 Moonshadow went to visit Mrs. Whitlaw to educate her on demons. Moonshadow was impressed that Mrs. Whitlaw seemed to be interested in other people. He explained about the dragons and was impressed with the knowledge he possessed and she could see his point of view. After his visit, Moonshadow came home thinking that demons weren't that bad.
A.) I was thrilled to find my keys they had been lost since yesterday.
This is a "fused sentence" or also known as a run-on sentence.
It can affect your life in the business world in a lot of ways. If you have good rhetoric, you're more likely to be hired and you'll probably perform better since you'd be more persuasive and eloquent.
If you have poor rhetoric, you're probably less likely to be hired because you don't know the vocabulary or you're not very persuasive. You also might perform poorly (for instance if you had to sell something and you didn't have good speech)