Environmental

Polychlorinated biphenyls (PCBs) in real estate are most commonly found in:

AOld lead paint
BTransformers, capacitors, and older fluorescent light ballasts✓ Correct
CTreated lumber in older decks
DFoam insulation in walls

Explanation

PCBs were widely used in electrical equipment such as transformers and capacitors, and in older fluorescent light ballasts. PCBs are toxic and persistent in the environment and were banned in the U.S. in 1979.

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