How did the building materials of castles usually change in the years after a region was newly taken over?
Stone castles were raised first and were later pulled down and replaced by cheaper timber ones
Castles were built of brick from the start and never changed material
Earth and timber castles went up quickly at first, and many were later rebuilt in stone✓Правильный ответ
Timber castles were built only after stone building had been forgotten
Объяснение
Earthwork and timber could be raised in weeks by unskilled labour, which mattered when a new lordship had to be held at once, and the slower, costlier material followed when time and money allowed. The reversed sequence fails because masonry needed skilled masons and years of work, so it could not have been the emergency first response to a newly seized district.