regnant women need to be especially careful to avoid food-borne illness. Foods more likely to be contaminated include: 答案选项组Ground beef cooked to 180 degrees Fahrenheitunpasturized dairy productscanned fruitsunbleached white bread

Pregnant women indeed need to be extra cautious to avoid food-borne illnesses. The foods that are more likely to be contaminated include:

1. Ground beef cooked to 180 degrees Fahrenheit: This is generally safe for pregnant women as long as it is cooked thoroughly to kill any bacteria. The internal temperature should reach 160 degrees Fahrenheit.

2. Unpasteurized dairy products: These are risky for pregnant women because they may contain harmful bacteria such as Listeria, Salmonella, E. coli, and Campylobacter. Pregnant women should avoid unpasteurized milk, cheese, and other dairy products.

3. Canned fruits: These are generally safe for pregnant women as long as the cans are not damaged or bulging, which could indicate a bacterial contamination.

4. Unbleached white bread: This is also generally safe for pregnant women. However, it's important to store bread properly to prevent mold growth.

So, among the options provided, unpasteurized dairy products are more likely to be contaminated and should be avoided by pregnant women.