Answer
Answer C
Work Step by Step
One light-year is: $5.9 \times 10^{12}$
The distance in one month is $\frac{5.9 \times 10^{12} }{12}$
In 3 months, the light can travel $\frac{5.9 \times 10^{12} }{12} .3 =1.475 \times 10^{12} \approx 1.5 \times 10^{12}$ mil.
The correct answer is C
