A radio station is going to construct a 12 foot tower for a new antenna on top of a tall building. The tower will be supoorted by three cables, each attached to the top of the tower and to points on the roof of the building which are 5 feet from the base of the tower. What is the total lenght of these three cables?
A. 13 feet
B. 39 Feet
C. 42 feet
D. 51 feet