Each of the following claims was written in an article: 1. Particles smaller than 2.5 micrometers in diameter are easily inhaled deep into the lungs where they can accumulate, react, be cleared or absorbed. 2. According to the American Academy of Pediatrics (AAP), children and infants are among the most susceptible to many air pollutants. 3. Children have increased exposure to air pollution because of higher minute ventilation and higher levels of physical activity. 4. The average adult breathes 3,000 gallons of air per day. If you had no knowledge of the subject which claim should be the MOST credible?

If you had no knowledge of the subject then According to the American Academy of Pediatrics (AAP), children and infants are among the most susceptible to many air pollutants- this claim should be the most credible.

Option: 2

Explanation:

If a person do not have any knowledge about environment related matter but have to believe some stement only by some common sense then the given context that according to the American Academy of Pediatrics  children and infants are among the most susceptible to many air pollution.

It is because children and infants have much less immunity power in comparison with adults. They are more prone to attack by diseases. Polluted air consists of harmful gases which affect child's health. As it is a report of doctor's organization that's why its reliable more.