Tia made a scale drawing of the White House for her history project. The actual length of the building is 168 feet, and its width (with porticoes) is 152 feet. If the scaled length of the building in the drawing is 21 inches and the width is 19 inches, what scale did Tia use to make the drawing?
A. 1 inch to 6 feet
B. 1 inch to 7 feet
C. 1 inch to 8 feet
D. 1 inch to 9 feet
E. 1 inch to 10 feet