Which Is a CORRECT and Complete Statement of Einstein's First

Which is a CORRECT and complete statement of Einstein's first postulate of special relativity?

A) Your description of physical reality is the same regardless of the constant velocity at which you move.
B) Your description of physical reality is the same regardless of the direction in which you move, even if the speed changes.
C) Your description of physical reality is the same regardless of how you move.
D) Your description of physical reality is the same regardless of the constant speed at which you move, even if direction changes.