What made manchuria attractive to the japanese?

a. it had a large japanese population.

b. it was rich in natural resources.

c. it was the closest japanese territory to china.

d. it had a nationalist government?

B--it was rich in natural resources.

Japan invaded Manchuria in 1931 in an effort to gain natural resources not available on the islands of Japan.

This was an imperialistic move by Japan meaning they were trying to get colonies like other Western countries. This is also the beginning of Japanese conquest leading up to World War II.