A Light Source Radiates 60 $\vec { B }$ Field of This Light at a Distance of 0

Multiple Choice

A light source radiates 60.0 W of single-wavelength sinusoidal light uniformly in all directions.What is the amplitude of the $\vec { B }$ field of this light at a distance of 0.700 m from the bulb?(ε₀ = 8.85 × 10^-12 C²/N ∙ m²,μ₀ = 4π × 10^-7 T ∙ m/A,c = 3.0 × 10⁸ m/s)

A) 1.76 × 10^-7 T
B) 2.02 × 10^-7 T
C) 2.22 × 10^-7 T
D) 2.86 × 10^-7 T