Kiku is planning to visit her nephew in Glenville. She knows that the distance from her hometown to Glenville is 207 miles. If Kiku's map shows a distance of 9 inches between her hometown and Glenville, what is the scale of the map?
A. 28 inches = 1 mile
B. 23 inches = 1 mile
C. 1 inch = 28 miles
D. 1 inch = 23 miles
