"Japan is the fountain source of the(pure Japanese) race. Manchukuo is its reservoir and East Asia is its paddy field." Is this quote from Document A supported or not supported by the map?

I think it is supported by the map.

Explanation:

Let´s start with paddy field: a flooded parcel of arable land, used for growing crops like rice. So if East Asia is where the Japanese race can be cultivated we have to have a reservoir somewhere between Japan and East Asia.

Manchukuo (or the state of Manchuria) was created by the Japanese in 1932 as a puppet state, and it is situated in northeastern China.

d

explanation:

i think that this is the best answer, but im sorry if this is wrong