Grace recently took a cruise onboard a luxury liner. a few days into her vacation, she developed signs of infection, the most common food-borne illness in the united states. a. anisakis b. trichinella c. botulism d. norovirus

The right option is d. norovirus infection

Noroviruses are viruses that cause gastroenteritis ; a condition that causes vomiting, fever and stomach pain. Norovirus is highly contagious. It spreads through contaminated food or water and through close contact with an infected person. Norovirus is the common cause of epidemics of gastroenteritis on cruise ships and it is the most common food-borne illness in the united states.