The entire circle in a pie chart equals: a. 100% b. 360° c. all of the above d. none of the above

I would say that the entire circle in a pie chart represents mainly 100% as pie charts are designed to show the portions of the total that say for taxes what % is spent on different services like say education, housing, medical etc. Of course it also represents 360 degrees but the pie chart uses % not degrees. So to sum it up, the pie chart represents all of the above.