The weakening of the Tokugawa Shogunate allowed nationalist groups to

take over the Japanese military.

destroy relations with the US.

ask for more support from the US.

demand a change in government

The Tokugawa shogunate, otherwise called the Tokugawa bakufu and the Edo bakufu, was the last medieval Japanese military government, which existed in the vicinity of 1600 and 1868. The debilitating of the Tokugawa Shogunate permitted patriot gatherings to request an adjustment in government. The answer is the 4th one.