The sauce that is a risk for food poisoning from your list is aioli (option a).

Why aioli is the risky option

  • Traditional aioli is made with raw egg yolks , which can carry Salmonella and other bacteria if the eggs are contaminated or not handled properly.
  • Because it is a low‑acid, protein‑rich sauce that is often held at room temperature, it can support bacterial growth if not kept cold or made with unsafe practices.

Other sauces (lower risk)

  • Tomato‑based sauces , sweet chili sauce , and salsa are generally more acidic , which helps inhibit many food‑poisoning bacteria, especially when they are commercially prepared and stored correctly.
  • That said, any sauce can become unsafe if it sits too long in the “danger zone” (roughly 5–60 °C / 41–140 °F), is cross‑contaminated, or made with spoiled ingredients.

So for your question, the correct choice is a) aioli.