Time lag in production causes inelastic supply for crops

Steps:

• Recall that supply elasticity measures how quantity supplied responds to price changes; inelastic supply shows little response.
• For agricultural crops like wheat, consider production timelines: planting, growing, and harvesting take fixed periods.
• Evaluate options: identify factors affecting short-run vs. long-run supply responsiveness.
• Select the factor that limits quick adjustments to price increases, making supply inelastic.

Why D is correct:

• Inelastic supply occurs when producers cannot quickly increase output due to the law of fixed factors; wheat requires months or seasons to grow, preventing rapid response to price changes.

Why the others are wrong:

• A: Government imports shift the supply curve rightward but do not inherently make it inelastic.
• B: Efficient fertilizers increase potential output, making supply more elastic over time.
• C: Storage allows shifting supply across periods but does not restrict immediate production responsiveness.

Final answer: D