Time Constraints Limit Short-Run Supply Elasticity

Steps:

• Price elasticity of supply (PES) measures percentage change in quantity supplied divided by percentage change in price; low PES (+0.2) indicates inelastic short-run response.
• In agriculture like coffee, production factors (e.g., planting, harvesting) require time, restricting immediate output adjustments.
• Short-run PES is low because fixed capacity prevents quick scaling; long-run PES (+2.0) rises as new plants mature.
• Thus, growth time explains the inelasticity.

Why A is correct:

• PES definition shows supply responsiveness depends on adjustment time; coffee's multi-year growth cycle fixes short-run capacity, limiting output to price changes.

Why the others are wrong:

• B: Describes demand inelasticity, not supply.
• C: Relates to demand elasticity via substitutes, irrelevant to supply.
• D: Stocks could buffer supply but do not explain inherent production delays.

Final answer: A