If a Laser Printer Prints at 600 Dots Per Inch $\mathrm{cm}$

Multiple Choice

If a laser printer prints at 600 dots per inch, what is the angular separation of the dots when viewed from 40 $\mathrm{cm}$ ?

A) $1.1 \times 10^{-4} \mathrm{rad}$
B) $2.7 \times 10^{-4} \mathrm{rad}$
C) $4.2 \times 10^{-5} \mathrm{rad}$
D) $3.7 \times 10^{-3} \mathrm{rad}$
E) $5.5 \times 10^{-8} \mathrm{rad}$