Please help me with these multiple choice questions. Thank you!

At equilibrium in an oligopoly, the size of economic profits will usually depend on the strength of

a.its relationship with its bank

b.the size of economies of scale

c.the presence of diseconomies of scale

d. MOS

e.the strength of barriers to entry

The simple and effective solution to diseconomies of scale at the plant level is

a. dumping

b. price discrimination

c. using multiple plants

d. shuting down

e. produce at sub-MOS

What is a tying contract (or agreement)?

a. A contract that has predatory pricing

b. A contract that charges different prices to different customers

c. A contract that requires the buyer interested in one of your products to buy another of your products as a condition of sale

d. Illegal volume discounts

e. An contract that makes a "2-for-1" (or similar) offer

In the DuPont "Clear Plastic Wrap Antitrust Case," DuPont challenged the government's definition of the relevant market. They did this primarily with

a.antitrust coefficients

b.cross elasticities

c.tax elasticities

d.income elasticities

e.supply elasticities

In the Alcoa Case (1945), the courts ruled that Alcoa

a. had used patents as a barrier

b. was not guilty because the company had never intended to create a monopoly

c. was not guilty because the company did not have 100 percent of the market

d. was guilty based on its large size alone

e. was guilty based on its illegal business practices