If the Eye Can Resolve Points Separated by 2 $\times$ 10^-4 Rad,when Viewed at 12

Multiple Choice

If the eye can resolve points separated by 2.20 $\times$ 10^-4 rad,when viewed at 12.0 inches,how many dpi is this? (dpi = dots per inch)

A) 250
B) 340
C) 380
D) 400
E) 590