56. According to the passage, what is the historical progression of the fireproofing method involving alum and vinegar?
(A) It was invented by the Romans and later adopted by Chinese shipbuilders.
(B) It was a Chinese innovation later utilized by Romans for maritime protection and UK theatres for stage safety.
(C) It was first used in UK theatres in the 1500s before being adapted for use in modern oil fire extinguishers.
(D) It was developed simultaneously in China and Rome to protect wooden structures from clay encasement.