Austin keeps a right conical basin for the birds in his garden as represented in the diagram. The basin is 40 centimeters deep, and the angle between the sloping sides is 77°. What is the shortest distance between the tip of the cone and its rim? A. 177.8 centimeters B. 64.3 centimeters C. 50.3 centimeters D. 51.1 centimeters E. 41.1 cm