Answer
$B$
Work Step by Step
The cotangent and cosecant functions are not defined for the following angles (or values of s):
$0, \pi, 2\pi, 3\pi, 4\pi, ...$
Notice that the coefficients of $\pi$ is are whole numbers.
Thus, the domain of the cotangent and cosecant functions is: $\left\{s|s\ne n\pi, \text{ where n is any integer}\right\}$
