The Most Significant Diplomatic Issue in Seventeenth-Century Europe Was ________

The most significant diplomatic issue in seventeenth-century Europe was ________.

A) what would become of the Spanish empire after Charles II's death
B) the rise of Louis XIV and his absolutist tendencies
C) the decline of Spain's power on the European stage
D) continuing religious divisions between Protestants and Catholics
E) the dissolution of the Union of Kalmar