The seventh-grade class is building target areas for a PE activity. The bases for the game will be circular in shape. The diameter of each circle is 5 feet. Approximately how many square feet of the turf need to be painted for a base circle? Use 3.14 for π and round your answer to the nearest tenth.
A.15.7 square feet
B. 19.6 square feet
C. 42.8 square feet
D. 78.6 square feet