At Most, How Many Bright Fringes Can Be Formed on One

Multiple Choice

At most, how many bright fringes can be formed on one side of the central bright fringe (not counting the central bright fringe) when light of 625 nm falls on a pair of slits that are $6.77 \times 10 ^ { - 6 } \mathrm {~m}$ apart?

A) 10
B) 9
C) 8
D) 11
E) 12