PTE Listening MC Single: What is the main idea that the speaker is trying to convey in her comments?

What is the main idea that the speaker is trying to convey in her comments?

• A.Authorization for the prescription of opiates is required every thirty days.
• B.Governments can play a key role in chronic pain management.
• C.The rate of morphine addiction has not increased over the past 18 years.
• D.The dose of opiates needed to treat chronic pain is usually 80 milligrams.