A) Only utilizing those painkillers that are chemically stable
Incorrect.
The resistance is caused by the brain's recognition of the ingredients, not the stability of the drug itself.
B) Maintaining a healthy lifestyle to improve liver function.
Incorrect.
The passage doesn't state that a healthy lifestyle can offset the specific damage caused by continuous painkiller use.
C) Slowly increasing the quantity of painkillers utilized over time.
Incorrect.
More painkillers would put more strain on the liver and give the brain more ingredients to neutralize.
D) Not using more than one type of painkiller at a time.
Incorrect.
Using only one type continuously is exactly what leads to the brain recognizing the ingredients and building resistance.
E) Periodically switching the type of painkillers used.
Correct.The passage states that resistance happens because the brain recognizes the constant intake of ingredients particular to a painkiller. If you switch the type of painkiller, the ingredients change. This prevents the brain from recognizing a single specific set of ingredients, thereby curbing the resistance effect.
Ans E