The base of a juice glass is in the shape of a circle
 with a diameter of 5 centimeters. Which of the
 following is closest to the circumference of the
 base of the juice glass? (Use 3.14 for π.)
 A 15.7 centimeters
 B 19.6 centimeters
 C 31.4 centimeters
 D 78.5 centimeters