How has the 1985 Schengen Treaty affected migration flows in Europe?
(1 point)
The treaty was a response to security concerns raised by significant migration that overwhelmed some countries.
The treaty significantly increased the number of refugees who migrated to Europe in the 1990s.
The treaty made migration among European countries more open, and many moved seeking economic opportunity.
The treaty established quotas for migration to ensure that Palestinian refugees were evenly distributed throughout Europe.
The treaty created strict controls on migration, which were reversed in response to the humanitarian crises of the mid-1990s.