A Radio Station Broadcasts At $80 \mathrm { MHz }$ How Long Does It Take for This Radio Signal

Multiple Choice

A radio station broadcasts at $80 \mathrm { MHz }$ . How long does it take for this radio signal to travel a distance of $2.0 \times 10 ^ { 7 } \mathrm {~m}$ through space? $\left( c = 3.0 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } \right)$

A) $25 \mathrm {~ms}$
B) $20 \mathrm {~ms}$
C) $15 \mathrm {~ms}$
D) $6.7 \times 10 ^ { - 2 } \mathrm {~s}$
E) $0.15 \times 10 ^ { - 2 } \mathrm {~s}$