Japan's response to gaining control over Manchuria primarily involved increasing its own influence and control rather than allowing Manchuria to establish its own government and trade policies. Therefore, among the options provided, none accurately reflect Japan's approach, but the most aligned option would be that Japan pushed out existing foreign interests (including American businesses) to assert its own control over the region. However, if you are looking for a definitive answer based on the historical context of Japanese imperial expansion, the best choice among the ones you've provided would be:
It pushed American business interests out of Manchuria.
This reflects Japan's efforts to dominate the region economically and politically.