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Answer (A) is correct . Beta measures the volatility of the return of a security relative to the returns on the market portfolio. In each case, the stock price increase or decrease was a greater percentage than the market change. Thus, the beta (stock change over market change) is greater than 1.0.

Answer (B) is incorrect because The beta is greater than one when the stock price changes at a greater rate than the market change.
Answer (C) is incorrect because The stock change is not the same as the market change.
Answer (D) is incorrect because There is a consistent pattern of the stock change being greater than the market change.