Final answer:
The correct answer is c) Eel, as unagi is a cooked eel dish that's often served to beginners in sushi due to its fully cooked nature and sweet sauce, reducing the risk of parasitic infections.
Step-by-step explanation:
Beginning sushi eaters often start out with unagi, which is not a raw fish but rather cooked eel that has been basted with a sweetish sauce. So the correct answer is c) Eel. While dishes such as sushi and sashimi typically contain raw fish, unagi is an exception where the eel is fully cooked, alleviating some concerns regarding parasitic infections that can be carried by raw or undercooked fish.
It is worth noting that to prevent such infections, fish should be frozen or cooked before consumption. This is because the extreme temperatures from freezing and cooking can kill potentially harmful worms and larvae. However, consuming raw sushi can still entail some risk, so delicacies like unagi can be a safer choice for those new to sushi or concerned about food-borne illnesses.