In a Social Agency, a Pie Chart Was Used to Display

In a social agency, a pie chart was used to display the distribution of the variable "years of education" of current clients. One-fourth (50 of 200) current clients had 12 years of education. How many degrees should the angle in the center of the chart be for the slice of the pie representing this group?

A) 4 degrees
B) 25 degrees
C) 50 degrees
D) 90 degrees