The government of a country announced two times in half a year to lower the interest rate on mortgages for home purchases. As a result, many potential buyers are in a state of holding currency to buy. Further wait and see if interest rates can reach a new low. It has fallen sharply, but a noteworthy phenomenon is that while the sales of newly-built house drawers have fallen sharply, the average personality of newly-built house sales is rising rapidly. Which of the following, if true, could explain this contradiction? ['The newly-built high-priced houses are on sale, and the prices have risen all the way, because buyers of high-priced houses are basically not affected by interest rate fluctuations.', 'Affected by interest rate fluctuations, home buyers have reluctant to sell their homes, resulting in insufficient market supply of second-hand housing.', 'Over the past three years, sales of newly built homes have been rising slowly due to increasing housing shortages.', 'Affected by the international market, the price of construction materials in the country has fluctuated continuously for one year.']