Answer: The correct option is (B). 72.
Step-by-step explanation: Given that a yogurt shop offers 6 different flavors of frozen yogurt and 12 different toppings.
We are to find the number of choices that are possible for a single serving of frozen yogurt with one topping.
We are to choose one frozen yogurt and one topping.
Since we have 6 different options for frozen yogurt and 12 different options for toppings, so the number of choices will be

Thus, there are 72 choices possible for a single serving of frozen yogurt with one topping.
Option (B) is correct.