This is a map showing the approximate positions of the continents millions of years ago, after the breakup of the last supercontinent. Assume that South America and Africa diverged (separated) at an average rate of 3.5 cm/year (centimeters per year). If the two land masses are now 2850 km (kilometers) apart, how many years ago did they separate?

A. 1.2 • 10^8 years

B. 1.0 • 10^5 years

C. 1.2 • 10^7 years

D. 8.1 • 10^7 years

E. 8.14 • 10^5 years

F. 1.05 • 10^4 years