Question

the two most common causes of persistent hiccups in terminally ill patients are:
gulping fizzy drinks and eating/drinking too fast
abdominal distention and gastrointestinal reflux (gerd)
gargling cold water and swallowing crushed ice
a diagnosis of heart disease or dementia

Explanation:

In terminally - ill patients, abdominal distention can put pressure on the diaphragm and cause hiccups. Gastrointestinal reflux (GERD) can also irritate the esophagus and trigger the hiccup reflex. Fizzy drinks and fast eating/drinking are more common in healthy people, gargling cold water and swallowing crushed ice are remedies rather than causes, and heart disease or dementia are not typical direct causes of persistent hiccups in this context.

Answer:

Abdominal distention and Gastrointestinal reflux (GERD)