In a Young's Double-Slit Experiment, When $( \pi d / \lambda ) \sin \theta$

Multiple Choice

In a Young's double-slit experiment, when $( \pi d / \lambda ) \sin \theta$ is a multiple of ( $\pi ( \pi , 2 \pi , 3 \pi )$ ) , the intensity at the viewing screen

A) is a maximum.
B) is a minimum.
C) is halfway between the maximum and minimum.
D) cannot be determined (we need $d , \lambda , \text { and } \theta$ )