Public goods are not produced by private sector producers because
a. there is too much competition
b. they are unable to produce them
c. monopolies are likely to be formed
d. they will not make an economic profit

Which of these statements about the cpp supports the sub-claim that it cleans the air? a. the cpp cuts particle pollution, nitrogen oxides, and sulfur dioxide by more than 25 percent. b. the cpp avoids up to 6,600 premature deaths. c. the cpp cuts electricity bills roughly 8 percent. d. the cpp provides americans with reliable and affordable power.

Which sentence best contrasts two things? a. air travel, like bus travel, is a fun way to get from one place to another. b. air travel is a fun and relatively easy way to get from place to place. c. both bus travel and air travel require substantial planning. d. air travel is much more expensive than bus travel.

According to the riddle of the rosetta stone, what problem did both jean-francois champollion and sylvestre de sacy face in their attempts to decipher the writings on the rosetta stone?