This is irrelevant. Only the scientists’ beliefs about lead paint are discussed, so it the harms of lead-free paint don;t matter. The right answer must explain why removing lead paint might make it more likely to be ingested.

The cost of removal is irrelevant, since the scientists’ beliefs are only about the likelihood of the paint being ingested. We only want to know about the ingestion risk of removing lead paint, not if removal is the best option overall.

Similar to (E), this is irrelevant since it tells us nothing about the dangers of removing lead paint. The correct answer must explain why scientists believe that removing the paint will be more harmful than leaving it.

This could explain why the scientists are wary about removing the paint. This information explains how the removal process would lead to children ingesting more lead paint than if the paint were left alone.

Similar to (C), this is irrelevant since it tells us nothing about the dangers of removing lead paint. The correct answer must explain why scientists believe that removing the paint will be more harmful than leaving it.