Which one of the following is the best representation of the titration curve that will be obtained in the titration of a weak diprotic acid H2A (0.10 mol L−1) with a strong base of the same concentration? 
Definitions:
Units Sold
The total quantity of products that a company has sold to its customers during a particular time frame.
Net Income
The total earnings of a company after all expenses and taxes have been deducted from revenue.
Contribution Margin
The amount remaining from sales revenue after variable expenses are deducted, used to cover fixed costs and generate profits.
Gross Margin
Gross Margin is the difference between revenue and the cost of goods sold, divided by revenue, expressed as a percentage. It indicates the percentage of revenue that exceeds the cost of goods sold.
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