GKFix MCQ Question

What is the expression for acceleration due to gravity at depth d below Earth's surface?

• A. g(d) = g(0)(1 + d/R)
• B. g(d) = g(0)(1 - d/R)
• C. g(d) = g(0)(1 - 2d/R)
• D. g(d) = g(0)(1 - d²/R²)