Geology, please help!!?
(Q002) Part 2.a. The Himalayas now reach an elevation of 8.8 km, and radiometric dating suggests that their uplift began about 45 million years ago. Assuming a constant rate of uplift, how fast did the Himalayas rise? Give your answer in kilometers, meters, and millimeters.
a. 5.11 × 106 km/yr; 5.11 × 109 m/yr; 5.11 × 1012 mm/yr
b. 5.11 × 103 km/yr; 5.11 × 106 m/yr; 5.11 × 109 mm/yr
c. 1.96 × 10–7 km/yr; 1.96 × 10–4 m/yr; 1.96 × 10–1 mm/yr
d. 1.96 × 10–1 km/yr; 1.96 × 102 m/yr; 1.96 × 105 mm/yr