What might reasonably be assumed about traditional Japanese culture from this portion of the passage?

A) Dumplings are a common and popular food in Japan.
B) Boys are thought to come from peaches.
C) Animals are believed to be able to talk.
D) Old couples are usually untrustworthy.

The statement that can be assumed about the traditional Japanese culture is:

Option A: Dumplings are a common and popular food in Japan.

Explanation:

Culture mostly refers to the beliefs, values, customs, lifestyle, food and religion of a nation.

Dumplings is believed to be a very common and popular Japanese food. It is like an inseparable element from Japanese cuisine and identifies their culture. Momotaro mentioned that he had the best Japanese millet dumplings in his pouch given by an old man and woman.

Thus, the passage is not about the boys  or animals. Neither it says that old couples are not trustworthy. It signifies Option A about the Japanese culture.