Which one please help me

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

1.     in what kind of government does a small group have a firm control over a country?  

What is the constitutional basis for the expressed powers of the federalgovernment?