The scale means for 1 inch on the postcard the bridge is 19,600 inches long
Multiply the width of the postcard by the scale:
5.5 x 19,600 = 107,800 inches
1 foot = 12 inches.
Divide total inches by 12 to get feet:
107,800 / 12 = 8983
The closest answer is D. 8,980 feet.