 Volume of Concrete per Column:

Each column requires 2,000 cubic feet of concrete.

 Lift Bucket Capacity:

Each lift bucket holds 40 cubic feet.

 Calculate Number of Lifts per Column:

Number of Lifts = Volume of Concrete ÷ Bucket Capacity = 2,000 ÷ 40 = 80 lifts.

 Cross-Verification:

Option B (50 lifts): Incorrect. Miscalculates required lifts.

Option C (5 lifts): Incorrect. Unrealistic for 2,000 cubic feet.

Option D (20 lifts): Incorrect. Underestimates.

Option A (80 lifts): Correct.