Read the passage carefully and choose the correct answer.

THE LEGEND OF “BANH CHUNG”

Chung cake was invented by the 18 Prince of Hung Emperor in the contest of looking for new Emperor. According to the legend, 3,000- 4,000 years ago, Prince Lang Lieu, made round and square Cakes, the round Day cake symbolizing the sky and the square Chung cake symbolizing the Earth (under the ancient Vietnamese perception), to be offered on the occasion of Spring.

In the ancient conception, the Earth is square, hence Chung cake’s shape is square, too, to reflect the Earth shape. Since the cakes he offered were of special meaning and delicious taste, Lang Lieu was selected to be the next Emperor. Since then, in honor of this 18th Prince, Vietnamese people always make and have Chung cake in the Luna, New Year. Up to now, Chung cake has become the most famous an irreplaceable traditional Vietnamese food in Tet Holiday. This legend aims to remind the next generations of the ancient tradition as well as the primary of Chung cake. Besides, it emphasizes the important role of rice and nature in water rice culture.

* Từ vựng:

- be invented: được phát minh

- symbolizing (v): tượng trưng, biểu tượng

- square (adj): vuông

- irreplaceable (adj): không thể thay thế

- legend (n): truyền thuyết

When was Chung cake invented?