We use sometimes the measures to know the direction of moment. It is done by right handed coordinate system. Which is right about it for the composite bodies (consider the mentioned axis to be positive)?$

• A. Thumb is z-axis, fingers curled from x-axis to y-axis
• B. Thumb is x-axis, fingers curled from z-axis to y-axis
• C. Thumb is y-axis, fingers curled from x-axis to z-axis
• D. Thumb is z-axis, fingers curled from y-axis to x-axis