What is the best option to improve her pain control?

A 54-year- old lady with a back pain is being managed with 1g paracetamol four times a day and ibuprofen which has been titrated up to the maximum dose of 2.4g/daily. Although she is tolerating this well, she is still complaining of ongoing pain. What is the best option to improve her pain control?

Stop paracetamol, continue ibuprofen and commence naproxen
Continue paracetamol, continue ibuprofen and commence naproxen
Stop paracetamol, stop ibuprofen and commence morphine
Continue paracetamol, stop ibuprofen and commence naproxen
Continue paracetamol, continue ibuprofen and commence morphine