The correct answer would be the Silk Road increased contact between China and the Middle East. Using the map, this is the only logical conclusion. You can see on the map that China is able to trade and go to the Middle East now. We cannot deduce from the map that China was established as an agricultural economy, or that China did not do sea trade with Persia beforehand, nor can we conclude that India was now China's biggest trade ally. There is just simply no evidence on the map to support those theories.