Final Answer:
The suitable topping, considering the pizza's initial setup with one topping selected and the subsequent choices of additional toppings, is "Onions."(C)
Step-by-step explanation:
To determine the correct topping for the pizza with the given criteria—1 topping from the list of sausage, beef, chicken, mushrooms, pineapple, tomato—requires assessing the options. First, mushrooms are listed as the original topping, so they are already included. Next, examining the other options—green peppers, onions, and olives—reveals that onions have not been mentioned in the initial list. Thus, the selection that adds a new topping to the existing one (mushrooms) is C) Onions.
The initial pizza already includes mushrooms as the 1 topping, eliminating them from consideration. Moving forward, assessing the options of green peppers, onions, and olives shows that onions are the only choice that has not been mentioned in the original list. Considering the criteria of adding an additional topping to the existing one, onions satisfy this condition.
Mathematically, we start with 6 toppings (sausage, beef, chicken, mushrooms, pineapple, tomato) and 1 topping has been selected (mushrooms). Therefore, 5 options remain. Among these, green peppers, onions, and olives are evaluated. As onions are the only topping not already present on the pizza, following the conditions set in the question leads us to choose C) Onions as the correct answer.