Cuba is one of the world's leading producers of sugarcane. consequently, sugar is its main export. why is this potential problem?
a. many other countries in latin america, such as brazil, are also top global producers of sugarcane.
b. a sudden drop in sugar prices or in production caused by a natural disaster could cripple cuba's economy.
c. many latin american countries have unstable governments and economies.
d. world sugar consumption is expected to drop sharply in a few years, as people become more health-conscious.

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.