Consider two cities A and B. In city A, the average price of single family houses is 200,000 dollars with a stadard deviation of 25,000 dollars. In city B, the average price of single family houses is 500,000 dollars with a standard deviation of 50,000 dollars. Which statement is correct? a. City A has a coefficient of variation of 10% b. City B has a less variable price distribution c. City A has a lower standard deviation and hence its price distribution is less variable d. City B has a coefficient of variation of 50,000 dollars