An analyst does research about arbitrage opportunities. With respect to the informational efficiency of markets, is the ability to correct the mispricing of assets most likely weakened if:（）

单项选择题An analyst gathered the following information about a company and that company's common stock: ·Weighted average cost of capital is 14% ·Intrinsic value per share is $22 ·Market price per share is $28 The company's investment projects for the year are expected to return 16 to 18 percent. Which of the following best characterizes the company and the company's common stock（）

A. Growth company and growth stock.
B. Growth company and speculative stock.
C. Speculative company and growth stock.

单项选择题An analyst does research about foreign investments. Which of the following is least likely to increase estimated required rate of return by foreign investors to purchase domestic securities（）

A. Exchange rate risk.
B. Real GDP growth rate.
C. Capital liquidity limitation.