If advertising succeeds in enhancing brand loyalty among consumers, it tends to enhance the monopoly power of the seller.

This statement is TRUE.

Explanation:

To enhace the monopoly power of a seller, means that one seller can monopolize or have more power over the market of certain products. What advertising does when succeeding is promoting one brand, generating consumers to buy only that same brand.

The consumer´s loyalty generates the monopoly of the market, making consumers only choose this same brand. This is why advertising is so powerfull and afects directly on the economy.

answer; i believe that the correct answer is (c) ///

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.