Which of the following is true about silk weaving in Cambodia?

Which of the following is true about silk weaving in Cambodia?

• A. The well-known ikat patterns have been passed down for a couple of years.
• B. It is done on large wooden frame looms in families or in communities
• C. The arts of ikats were taught in schools in the past.
• D. More than 200 different patterns of ikats are known to be in existence.