Answer:
They successfully invaded Manchuria.
Step-by-step explanation:
Modernization pay off for Japan in many ways, however, given the options available, the right answer is: they successfully invaded Manchuria.
Japan's modernization was first demonstrated in terms of military action, where they successfully defeated Russia, a major european power, in the Russo-Japanese War of 1905-06 over the rights of Manchuria and Korea. This and many other war victories made Japan to annexed and established colonies in other parts of East Asia
By 1931, Japan would also take control of Manchuria and established the puppet state of "Manchukuo"; this even led Japan to invades the rest of China in 1937.
Hence, the right answer is: They successfully invaded Manchuria.