Final answer:
Option D. Carrots, tomatoes, cucumbers, red onions, croutons, shredded cheddar and choice of dressing is the correct answer as it includes a variety of common salad toppings.
Step-by-step explanation:
When it comes to topping a standard side dinner salad, the most common ingredients typically include tomatoes, cucumbers, red onions, croutons, shredded cheese, and a choice of dressing. Therefore, the answer to what items top the standard side dinner salad is D. Carrots, tomatoes, cucumbers, red onions, croutons, shredded cheddar and choice of dressing. This option provides a variety of vegetables commonly found in a dinner salad and includes the addition of carrots, which are a nutritious component offering both crunch and color.