Answer: C. 9 combinations
Explanation:
Given: The different flavors of ice-cream : strawberry, chocolate, and vanilla
Then , the number of different flavors of ice-cream : 3
The different toppings : whipped cream, hot fudge, and nuts
Then , the number of different toppings : 3
Now, the If we can order one ice cream flavor and one topping, then the number of possible combinations are :-

Hence, there are 9 possible combinations.