Final answer:
Breonna's symptoms of stomach cramps, explosive vomiting, and watery diarrhea while on a cruise suggest an infection with norovirus, which is a common cause of foodborne illness on cruise ships.
Step-by-step explanation:
Based on the information provided about Breonna's symptoms which include stomach cramps, explosive vomiting, and watery diarrhea, and considering the common causes of foodborne illness, Breonna most likely became infected with norovirus. Norovirus is a highly contagious virus that causes inflammation of the stomach and intestines and is a notorious culprit for outbreaks on cruise ships.
Other foodborne pathogens such as hepatitis A, Salmonella species, and Listeria monocytogenes also lead to similar symptoms, but norovirus is the most common cause of acute gastroenteritis on cruise ships. Hepatitis A, while also a foodborne virus, primarily leads to inflammation of the liver and does not usually present with explosive vomiting and watery diarrhea as the predominant symptoms.