Final answer:
String beans can be served with a variety of entrees including chicken, beef, and tofu. Therefore, the correct answer to which entrees are served with string beans is 'All of the above'.
Step-by-step explanation:
The entrees that are typically served with string beans can vary widely, but they often include a variety of protein sources. The most common options would be chicken, beef, and tofu. So, when it comes to choosing an entree that pairs well with string beans, all the options listed—A) Chicken, B) Beef, and C) Tofu—are correct, making D) All of the above the correct answer to the question.