BRAINLIEST Which of these happened before Spain signed a treaty that handed part of a Caribbean island over to France?

Frederick Douglass spoke about Haiti's revolution.
Slaves in Saint-Domingue launched a series of battles.
Christopher Columbus colonized the island of Hispaniola.
Napoleon sent an army to attack Toussaint L'Ouverture.

Aresearcher conducts a focus group to learn about attitudes towards hygiene and disease prevention. two weeks after the focus group, the researcher learns one of the subjects had a heart attack at home and was hospitalized, but made a full recovery. based on dhs regulations, the researcher report this event to the irb? no, this does not need to be reported since the subject had the heart attack when they were home, not at the focus group.no, this does not need to be reported since it is unrelated to participation in the study.no, this does not need to be reported because two weeks have passed.no, this does not need to be reported since the subject recovered.

Humphreys collecting data for the tearoom trade study under the pretense that he was a lookout is an example of a violation of the principle of: a. justice.b. beneficence.c. respect for persons.

What obstacles did jen bricker face early in life?