Answer:
(i) Option (A) is correct.
(ii) Option (A) is correct.
Explanation:
(i) Marginal revenue refers to the change in total revenue obtained from the sale of an extra unit of a commodity. It is calculated by differentiating total revenue with respect to output. It is shown as:

where,
TR = Total revenue
q = output
(ii) In a perfectly competitive market, price is equal to both average revenue and marginal revenue. Since, firms in a competitive market are not required to reduce the price of their product for selling more number of units. Hence, the average revenue remains the same at all the level of output. That's why average revenue in equal to the price under perfect market conditions.
Therefore, every additional unit of an output is sold at a same price, so the marginal revenue obtained from an extra unit is constant and hence, price is equal to the marginal revenue.
Cut of alcohol
Explanation:
If they drink mre they are likely to becom drunk and migjt get into an accident
Can I get more information?
Answer:
Answer is Option A: do nothing, as PMSIs are automatically perfected.
Explanation:
PMSI stands for Purchase-Money Security Interest which is a legal claim that a lender can do to repossess the property financed with its loan. He may also demand repayment in cash in case the borrower defaults. But in case of consumer goods, PMSI in consumer goods is not required to be filled because it is automatically perfected without filling.
In the given scenario when a refrigerator is bought and the store create PMSI in the refrigerator so that Sung can pay it over time, they have to do nothing do get PMSI perfected.