The figure below plots the chemical composition of the Sun as a function of radius for three different times.Which graph represents the correct chemical composition just prior to the Sun becoming a red giant? 
Definitions:
Profit
The financial gain obtained when the revenue generated from a business activity exceeds the expenses, taxes, and costs involved in sustaining the activity.
Dollar Sales Revenue
The sum of all revenue earned from selling goods or services prior to subtracting any costs or expenses.
Market Share
The slice of a market under the control of a particular company or product.
Unit Sales
The total number of individual items or units sold within a specific timeframe.
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