How Much Current Must Flow Through a Long Straight Wire $1.0$

Multiple Choice

How much current must flow through a long straight wire for the magnetic field strength to be $1.0$ $\mathrm { mT }$ at $1.0 \mathrm {~cm}$ from a wire? $\left( \mu _ { 0 } = 4 \pi \times 10 ^ { - 7 } \mathrm {~T} \cdot \mathrm { m } / \mathrm { A } \right)$

A) $9.2 \mathrm {~A}$
B) $5.0 \mathrm {~mA}$
C) $50 \mathrm {~A}$
D) $50 \mathrm {~mA}$
E) $16 \mathrm {~A}$