Which of these is a statement of opinion?
A. In 1804, Saint-Domingue, now called Haiti, became its own nation.
B. In 1789, the long overdue Declaration of the Rights of Man was passed.
C. In August 1791, slaves in Saint-Domingue initiated a series of battles in the northern part of the colony.
D. In 1492, Christopher Columbus colonized the Caribbean island of Hispaniola under the Spanish flag.