At a certain place,the angle of dip is $30^{\circ}$ and the horizontal component of the Earth's magnetic field is $0.50 \text{ Oersted}$. The Earth's total magnetic field is:
- A$\sqrt{3} \text{ Oersted}$
- B$1 \text{ Oersted}$
- C$\frac{1}{\sqrt{3}} \text{ Oersted}$
- D$\frac{1}{2} \text{ Oersted}$
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