What was a major effect of the russo-japanese war?
japan added manchuria to its territory.
japan was viewed as the most powerful nation in east asia.
russia defeated the japanese fleet.
russia rose as a major competitor for power in east asia.

The correct answer is:

Japan was viewed as the most powerful nation in East Asia.

The war ended with the Treaty of Portsmouth (1905), which confirmed Japan's development as the most powerful nation in East Asia, and forced Russia to drop its expansionist policies in the area. The traeaty affirmed the Japanese presence in south Manchuria and Korea and ceded the southern half of the island of Sakhalin to Japan.

b. florence

d. milan

the correct answer is b.