Physical quantities and measurement techniques — practice question

A star lies 4.2 light-years away from the Earth. How many metres are equal to 4.2 light-years?

• A$1.1 \times 10^{13}\,\text{m}$
• B$6.6 \times 10^{14}\,\text{m}$
• C$9.5 \times 10^{15}\,\text{m}$
• D$4.0 \times 10^{16}\,\text{m}$