State the conclusion based on the results of the test. According to the Federal Housing Finance Board, the mean price of a single-family home two years ago was $299,500. A real estate broker believes that because of the recent credit crunch, the mean price has increased since then. The null hypothesis is rejected. Choose the correct answer below. O A. There is sufficient evidence to conclude that the mean price of a single-family home has decreased from its level two years ago of $299,500. O B. There is not sufficient evidence to conclude that the mean price of a single-family home has decreased from its level two years ago of $299,500. O C. There is not sufficient evidence to conclude that the mean price of a single-family home has increased from its level two years ago of $299,500. O D. There is sufficient evidence to conclude that the mean price of a single-family home has increased from its level two years ago of $299,500