Help pls!! True or false

Which statement best describes a major advantage of a confederal system of government over a unitary system

Were african-americans allowed to serve in the military in wwi?

What is the evidence that depression can be linked to genetic as well as environmental factors? a. all individuals in similar stressful environments do not experience depression. b. all individuals with the gene variation tied to depression do not experience depression. c. individuals with a combination of environmental stress and gene variation are more likely to experience depression d. all of the above select the best answer from the choices provided оа 0 0 0