Stress = force / area at elastic limit

Steps:

• Elastic limit force F = 4.0 kN = 4000 N is the maximum without plastic deformation.
• At elastic limit, stress σ = F / A, so F = σ A with consistent units (A in m², σ in Pa).
• Choices give numerical values for A and σ, but units for σ (e.g., MPa, kPa) and confirmation for A are not specified.
• Without units, cannot compute if any pair satisfies F = 4000 N.

Not enough information.

Final answer: Not enough information.