It’s between b and d but i would choose D
China! In 1894, Japan fought a war with China over control of Korea. Easily defeated China AND won control of both Korea and Farmosa
The science that isn't considered a social scence from the ones you've mentioned would definitely be biology as it studies the relation between things on a very small level and often includes dead specimens.
The answer is B. Allied Forces began to take the offencive for the first time in the Pacific.