China's use of which of the following types of energy is causing high levels of carbon dioxide pollution?

Some colleges now offer massive open online courses (MOOCs), where students do not need to be in the same classroom as their instructors

The fixed cost of an online course is relatively ________, but after the courses are placed online, the marginal cost of providing instruction to an additional student is ________. A) high; low B) high; high C) low; high D) low; low

Full employment is considered a major economic goal because: a. specialization is not possible without full employment

b. economic growth can only occur when there is full employment. c. the opportunity cost of unemployment is lost production. d. profit maximization of firms can only occur when there is full employment. e. inflation will be lower when full employment is achieved.