T1W7 TS Q20 – Selective High School

When wood is burnt, the smoke contains dangerous toxins that cause changes in human cells. Because wood smoke displays such a high health risk, a law is needed to control the use of open-air fires and wood-burning stoves.

Which of the following, if true, most strengthens the argument above?

The amount of dangerous toxins contained in wood smoke is much less than the amount contained in vehicle exhaust fumes. Smoke produced by coal-burning stoves is significantly more toxic than smoke from wood-burning stoves. Burning wood leaves a lot of soot behind. In areas where wood is used as the primary heating fuel results in poorer air quality.

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Which of the following, if true, most strengthens the argument above?