The cost of each house in New Mexico is summarized in the histogram to the left. Houses that are worth more than 1 million dollars are not shown due to space limitations. Above 1 million dollars, the number of houses continues to decrease steadily as the cost increases. What is the range of house costs?

a. 0
b. 150 thousand a
c. 1,000 thousand
d. There is not enough information to determine the range.