Resultant direction from vector polygon closure

Steps:

• Draw the three force vectors head-to-tail to form a closed polygon, with the resultant as the straight line from start of first to end of last.
• Measure the magnitude of this closing side, given as 1 N.
• Determine the direction of the closing side relative to the forces.
• Match this direction to the choice showing the resultant arrow.

Why D is correct:

• D aligns with the vector sum's direction, per the parallelogram law of vector addition for coplanar forces.

Why the others are wrong:

• A points opposite the net force, ignoring equilibrium.
• B follows one force only, neglecting others.
• C bisects angles incorrectly, violating vector addition.

Not enough information: Diagram and choice descriptions missing for precise verification.

Final answer: D