Solution
Option 1 -> The passage mentions side effects like grogginess and nausea, but does not state that melatonin supplements are addictive or cause withdrawal symptoms.
Option 2 -> The passage indicates melatonin is most beneficial for specific situations (irregular shifts, time zone changes), not severe sleep disorders. It's actually ineffective for underlying conditions like anxiety or depression.
Option 3 -> The passage clearly states melatonin doesn't work for underlying anxiety or depression, that these conditions require therapy like CBT, and that prolonged use leads to side effects like grogginess and nausea. Melatonin is described as a "physiological supplement" rather than a treatment for root causes.
Option 4 -> The passage recommends use "under medical supervision," suggesting approval, but doesn't state they are unapproved by medical authorities.
Hence, Option 3 -> The passage emphasizes that melatonin supplements are not a magic solution because they don't address underlying causes like anxiety or depression (which require psychiatric consultation and CBT), and prolonged use can cause side effects. Experts stress the need to identify and treat the root cause of sleep problems rather than relying on supplements alone -> correct