The figure below shows line \ell with a regular, infinite, recurring pattern of squares and line segments.
How many of the following four kinds of rigid motion transformations of the plane in which this figure is drawn, other than the identity transformation, will transform this figure into itself?

some rotation around a point on line \ell

some translation in the direction parallel to line \ell

the reflection across line \ell

some reflection across a line perpendicular to line \ell
Answer Choices
A. 0
B. 1
C. 2
D. 3
E. 4