The first two hours of Melanie’s trip was spent travelling at 100 \mathrm{~km} / \mathrm{h}. The remaining 200 \mathrm{~km} of Melanie’s trip was spent travelling at 80 \mathrm{~km} / \mathrm{h}. Melanie’s average speed during this trip is closest to
Answer Choices
A. 80 \mathrm{~km} / \mathrm{h}
B. 89 \mathrm{~km} / \mathrm{h}
C. 90 \mathrm{~km} / \mathrm{h}
D. 94 \mathrm{~km} / \mathrm{h}
E. 100 \mathrm{~km} / \mathrm{h}