Which of the following is a correct resonance structure for compound A? 
Definitions:
Market Index
A theoretical portfolio of investments representing a segment of the financial market, used as a benchmark to measure the performance of investments.
P/E Ratio
The Price to Earnings ratio, a valuation metric for stocks calculated by dividing the market price per share by its earnings per share.
Earnings Growth Rate
The annual rate of growth of a company's earnings per share, indicating the company's profitability trend over time.
Required Return
The minimum return an investor expects to achieve on an investment to compensate for its risk.
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