Ian purchases a digital thermometer to keep at his home. The instruction packet spells out how Ian can change the default reading from Celsius to Fahrenheit. Ian is taken aback because he lives in the United States. What does the presence of these options MOST likely indicate?

Keeps you from getting lung cancer from smoking

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases.