Which of the Following Statements Is Supported by Research on Lead

question 75

Multiple Choice

Which of the following statements is supported by research on lead exposure during childhood?

• A) Overall, poorer mental test scores associated with lead exposure persist over time and seem permanent.
• B) Lead-exposed children given drugs to induce excretion of lead improve in long-term outcomes.
• C) Once lead-exposed children move away from contaminated areas, their mental test scores increase.
• D) Negative lead-related cognitive consequences are evident only at high levels of exposure.

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Definitions:

Ozone Layer

The layer in the Earth's stratosphere that contains a high concentration of ozone, which protects life on Earth by absorbing most of the sun's harmful ultraviolet radiation.

Signatories

Parties that have signed an agreement, particularly in the context of treaties or contracts, signifying their agreement to the terms.

Significant Deterioration

A regulatory term referring to any substantial change that leads to a noticeable decrease in air quality beyond predefined limits.

Air Pollution

The presence of harmful or excessive quantities of substances, including gases, particulates, and biological molecules in the Earth's atmosphere, potentially causing health problems for living organisms and damage to the environment.