The mean distance between the Earth and the Sun is $1.5 \times 10^{11}\,\text{m}$. Determine the orbital speed of the Earth.
- A$4.0 \times 10^{5}\,\text{km/day}$
- B$1.3 \times 10^{6}\,\text{km/day}$
- C$2.6 \times 10^{6}\,\text{km/day}$
- D$1.9 \times 10^{14}\,\text{km/day}$