​Adverse selection in insurance requires that

A) ​all people face the same risk
B) potential customers facing more risk are more interested in purchasing insurance
C) people are not risk averse
D) ​insurers can tell higher risk people from lower risk people

Which of the following ratios increases when a company switches from FIFO to LIFO during a period of increasing unit costs?

A) Net profit margin.
B) Inventory turnover.
C) Quick.
D) Current.