[单选题]
The pupil of a person' (3khk qknfm4r,tr /5zfx mz6*s x tw/fzqa 21 iit21a6;izl oc;eye changes from a diameter of 3.5 mm to 1.5 mm as the iizc;fawa 2o1/ziix 2 ql1 t;t6llumination is increased. By what factor does the minimum angle of resolution change?