The right option is c. heartburn
Heartburn is a painful burning feeling
in the throat or chest. Heartburn is common and it increase in prevalence with
age. As people gets older some activity that makes acid indigestion worse occur
and can contribute to heartburn. For example the sphincter at the upper part of
the stomach, which opens to allow food substances to enter the stomach tends to
relax a bit more with age and this allows stomach acid to move slowly into the esophagus and heartburn can occur.
