Which of the Following Statements Correctly Describes the Unified Castile-Aragon

Multiple Choice

Which of the following statements correctly describes the unified Castile-Aragon after the royal marriage of Isabella and Ferdinand?

A) Boundaries were established that were respected by both.
B) Trade duties benefited both areas.
C) Both monarchs enjoyed equal support in both regions.
D) Extradition laws were established to both areas' satisfaction.
E) None of these.