This question tests the understanding of economic influences on the real estate market. The correct answer is 'C. It fuels a gold rush in the $4 million to $10 million range' because the statement mentions that Wall Street bonuses are driving activity in this price range. 'A. It causes a decline in property values' and 'D. It results in a stagnation of the real estate market' are negative impacts, which are not indicated. 'B. It leads to a decrease in the number of properties sold' suggests a reduction in activity, which contradicts the information given.