T(p) is a function that models the average yearly temperature based on the degree latitude(p) of the location on earth. The lines of latitude run from East to West, but they are measured in terms of North and South, extending from -90° to +90°. Which domain is appropriate for this function?
A. D= all positive real numbers
B. D= all whole numbers
C. D= integers between 0 and 100
D. D= all real numbers between ± 90 , inclusive