[单选题]
The pupil of a person'sxhsh 9fs9sp62h n-k6cr o- xqlo g:f+3 eye anq e1mx8a 0vgw8nd(3z-yrv0 changes from a diameter of 3.5 mm to 1.5 mm as the illumination is increased. By w 1q0a03 d8nv-yrzw(ae8mnvx ghat factor does the minimum angle of resolution change?