Soru

During the medieval period, the techniques used to construct monumental cathedrals were closely guarded secrets, known only to members of exclusive stonemason guilds. These guilds strictly prohibited their members from documenting these techniques in writing. Instead, methods were transmitted orally and practically, and only to apprentices who had served in the guild for at least seven years. Historians note that when a highly complex architectural feature suddenly appears in two distant European cities during the same decade, it is almost certain that either master masons migrated between the two cities, or one city acquired the other's masons as spoils of war. The "flying buttress," a highly complex architectural feature, first appeared in both City P and City Q during the 1180s. However, extensive political archives confirm that City P and City Q were never involved in any wars or armed conflicts with each other or any common enemies during the 12th century.

Based on the information provided, which of the following statements are most strongly supported? Select all that apply.