The correct option is D. Memmott explains that the tragedy is not well known today and then shows why it is worth remembering.
Dominican Republic and Haiti are neighbor countries. Many Haitians seek for refuge in their neighbor nation until today, because the Dominican Republic has been increasing its economy over the years, giving more opportunities for a better life than in Haiti.
Unfortunately, through cruelty, Trujillo's government executed many Haitian people only because they were from a different nationality, creating an environment of hate for those people.
The need of remembering this tragedy is for all the Haitians that were killed during that time and for the ones who, even though were born in the Dominican Republic, still cannot have their civil rights such as education, health care and legal documentation only because their mother or father are from Haiti.
Border of lights is a movement to remember and grief all those people and also collaborate to bring more justice into this country.