Find the magnetic field at the point P in figure. The curved portion is a semicircle connected to two long straight wires.

A

$$\frac{\mu_0 i}{2r}\left(1 + \frac{2}{\pi}\right)$$

B

$$\frac{\mu_0 i}{2r}\left(1 + \frac{1}{\pi}\right)$$

C

$$\frac{\mu_0 i}{2r}\left(\frac{1}{2} + \frac{1}{2\pi}\right)$$

D

$$\frac{\mu_0 i}{2r}\left(\frac{1}{2} + \frac{1}{\pi}\right)$$