Josh has a genetic defect that can affect his liver. He must be careful of many prescription drugs because they can cause damage to his liver. Still, Josh suffers from chronic headaches. He carries a container of peppermint oil that helps relieve his headaches naturally. What would you say is the MOST likely reason for Josh’s use of peppermint oil?

it is less expensive than traditional headache medicine
he does not have to swallow a pill this way
the peppermint oil would not be dangerous to his liver
josh just likes the smell of peppermint oil

The most likely reason for Josh's use of peppermint oil is that it would not be dangerous to his liver. Given his genetic defect and the potential harm that prescription drugs can cause to his liver, it is reasonable to assume that he would prefer a natural remedy like peppermint oil that does not pose a risk to his liver.