GKFix MCQ Question

How is the mass of the inner sphere (M_s) related to the total mass of the Earth (M_E)?

• A. M_s / M_E = (R_E – d) / R_E
• B. M_s / M_E = (R_E – d)² / R_E²
• C. M_s / M_E = (R_E – d)³ / R_E³
• D. M_s / M_E = R_E³ / (R_E – d)³