Cultural heritage includes material cultural heritage and intangible cultural heritage. Which of the following cultural heritage belongs to intangible cultural heritage?

Material and cultural heritage is a cultural relic with historical, artistic and scientific value, including immovable cultural relics such as ancient sites, ancient tombs, ancient buildings, cave temples, stone carvings, murals, important historical sites and representative buildings in modern times, and movable cultural relics such as important objects, artworks, documents, manuscripts, books and materials. And famous historical and cultural cities (blocks, villages and towns) with outstanding universal value in architectural style, uniform distribution or combination with environmental scenery.

"Intangible cultural heritage" refers to various customs, performances, forms of expression, knowledge systems and skills as well as related tools, articles, handicrafts and cultural sites that are regarded as their cultural heritage by various groups, groups and sometimes individuals.

Intangible cultural heritage includes:

A. oral traditions and expressions;

B. performing arts;

C. social customs, rituals and festivals;

D. knowledge and practice about nature and the universe;

E. traditional handicraft skills.