Final answer:
Black beans have the highest amount of zinc per serving among the given options. They are nutrient-dense and provide significant amounts of protein and fiber without containing much fat, sodium, or sugar.
Step-by-step explanation:
Black beans have the highest amount of zinc per serving among the given options. According to the provided information, black beans are nutrient-dense and are a good source of many micronutrients, including zinc. One cup of cooked black beans provides significant amounts of protein and fiber without containing much fat, sodium, or sugar.