These are the results and manifestations of the formation of the world market. 1900 or so, this is the further development of the second industrial revolution, when the world market was formally formed.
A B C is purely out of thin air.
3.a It used to be common for China to promote domestic products, such as boycotting Japanese products and promoting domestic products in the early years of the Republic of China.
B the Chinese movement only increased the capital of Britain and Japan and weakened their strength, rather than letting them quit completely.
C After reading the materials carefully, it can be found that the materials do not involve any influence brought by the movement of domestic products on national industries, but only compare the strength of domestic products and foreign products;
Choose d, as can be seen from the last sentence