Which statement correctly describes the lead paint limit history?

• A. They apply only to exterior paint
• B. Lead in interior paint was limited to 1% by weight starting in 1955
• C. They apply to drinking water only
• D. Lead-based regulations started in the 1950s

Answer: (B)

Historically, regulatory efforts to reduce lead exposure in living spaces focused on paint inside homes. In 1955, interior house paints were limited to no more than 1% lead by weight. This precise threshold gives a clear, location-specific description of the history: it targets interior surfaces where occupants are exposed to dust and chipping paint, not exterior surfaces or drinking water. The other statements miss either the scope (exterior paint), the exposure pathway (drinking water), or the precision of the timing (a broad start in the 1950s) compared to the definite interior 1% limit established in 1955.