Here I had a handout that my teacher gave me hopefully this will help you! If not I can help you further
Can you add more context to your question please
It is B because think of it as today’s media and how world leaders post on media to communicate with the world
Natural barriers such as the Himalayan Mountains made it difficult to trade across long distances and with other civilizations. Travel southwards to India was nearly impossible. Thus, trade was localized and was unable to grow. This isolated China from making contact with other civilizations