Weight is calculated as mass times gravitational field strength Steps:

• Use formula: weight (W) = mass (m) × gravitational field strength (g)
• For A: W = 3.0 kg × 9.5 N/kg = 28.5 N
• For C: W = 4.0 kg × 10.2 N/kg = 40.8 N
• For D: W = 4.5 kg × 9.0 N/kg = 40.5 N (B lacks data, so exclude from comparison) Why C is correct:
• Its weight (40.8 N) is highest, per Newton's law of universal gravitation where weight is mg Why the others are wrong:
• A: Weight (28.5 N) is lowest due to small mass and moderate g
• B: Not enough information (no mass or g provided)
• D: Weight (40.5 N) is slightly less than C's despite higher mass, due to lower g

Final answer: C