In which answer figure can the slanted shape X be found, in the same size and the same way up?

X is a parallelogram whose flat sides are 4 units long and whose slanting sides lean to the right. In (a) the bottom edge, the lowest flat line and the two right-leaning lines, which start 4 units apart, form exactly this shape. (b) has lines leaning the other way (the mirror shape), the slanting lines in (c) start only 2 units apart, and (d) has no flat line at the right height.