Improved efficiency.
A study shows that downsizing lowered customer satisfaction -
Another study shows that downsizing increased efficiency, but nothing of employee productivity.
Answer:
-4 units
Explanation:
Using the midpoint method, Blake's income elasticity of demand for generic potato chips is given by the change in demand (D) multiplied by his average income (I), divided by the change in income multiplied by the average demand:

Blake's income elasticity of demand is -4 units.
Entertainment; actors, singers, etc.
Answer:
B) All final goods and services produced in an economy in a given year
Explanation:
That's the definition of GDP, gross domestic product. By virtue of the name, it's the total product (output) of a given economy. It's measured through the values of all final goods and services, so as to not count the same good or service twice.