For this reason..
Usually they use this phrase to explain why something had happened in this case it could be referred to the solution
Answer:
England's demand for tea caused conflict around the world.
"The trade was so important that it brought the two countries to war. The first of the conflicts, which we still refer to as the Opium Wars - they were in fact just as much about tea - broke out more or less as our teapot was leaving the Wedgwood factory. "
The second one. If other people think the thing you think, especially if they are people who are likely to know what they are talking about, it adds credibility (believability) to the argument you are making.
B) After seven years without contact, my old pen pal managed to track me down on the internet, and I was thrilled to hear from her.
Run-on sentences have two parts, each part should be able to stand alone in a sentence.
