Which of the following is/are correct resonance structure(s) for compound A? 
Definitions:
Total Fixed Costs
The sum of all costs that do not change with the level of output, such as rent, salary, and insurance premiums.
Earrings
Jewelery pieces worn on the ear, typically fastened through a hole pierced in the earlobe or another external part of the ear.
Average Total Cost
The total cost of production divided by the quantity of output produced, representing the cost per unit.
Total Cost
The sum of all expenses incurred in the production of a good or service, including both fixed and variable costs.
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