What is one potential benefit of establishing trade barriers? A. They typically increase sales of exports to other countries.
B. They can make a country more economically self-reliant.
C. They create greater economic efficiency by minimizing waste.
D. They provide domestic consumers with a wider variety of goods.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.