Light from a Small Region of an Ordinary Incandescent Bulb

Multiple Choice

Light from a small region of an ordinary incandescent bulb is passed through a yellow filter and then serves as the source for a Young's double-slit experiment.Which of the following changes would cause the interference pattern to be more closely spaced?

A) Use slits that are closer together
B) Use a light source of lower intensity
C) Use a light source of higher intensity
D) Use a blue filter instead of a yellow filter
E) Move the light source further away from the slits