Which ratios are equivalent? Check all that apply.

Equivalent ratios have the same value after simplifying. For A, 9:15 simplifies to 3:5, and 18:30 also simplifies to 3:5. For D, 20:24 simplifies to 5:6, matching 5:6; B and C do not simplify to matching ratios.

AI-written and checked against the verified answer.