Why is a system of currency exchange necessary for international trade? a) nearly all world currencies are worthless on the world market. b) those buying goods on the world market only accept payment in gold and silver. c) most goods bought on the international market must be bought and paid for using united states dollars only. d) there must be a way to pay for goods purchased from countries with different types of currencies due to nationalism

What would you call a political system that is only meant to last for a short time

Asociologist wants to study a culture that occurs in some women’s prisons: “state families,” in which individual prisoners take on certain roles within a group of like-minded prisoners. there is previous evidence that younger prisoners will use older inmates who play the roles of grandparents as a resource before they will turn to staff for and advice. the lieutenant in charge of a dorm of long-term prisoners offers to gather volunteers to speak to the researcher and also offers to vouch for the integrity of the researcher. the use of this staff is: a valid use of a statistical technique referred to “snowball sampling” wherein the inclusion of the first subject leads to the recruitment of another one subject.a useful tactic in obtaining a sample of prisoners who both meet the criteria and who will be honest with the researcher.wrong and is prohibited; subject selection needs to be free from intervention by prison authorities or prisoners.acceptable only when the researcher’s irb grants a special waiver.

Which latin american country’s language and culture is greatly influenced by portugal