Two Candles Are Lit and Separated by 0

Multiple Choice

Two candles are lit and separated by 0.10 m. If the diameter of the pupil of an observer's eye is 3.5 mm, what is the maximum distance that the candles can be away from the observer and be seen as two light sources? Use 545 nm for the wavelength of light in the eye.

A) 170 m
B) 340 m
C) 530 m
D) 680 m
E) 850 m