A sandwich shop sells sausage sandwiches, bacon sandwiches, and 16 different toppings. How many choices are there for a single sandwich with one topping?

A. 18
B. 24
C. 32
D. 34

There are 2 types of sandwiches (sausage and bacon) and 16 different toppings, giving a total of $2 \cdot 16 = 32$ choices. Since each sandwich can only have one topping, we have to divide by 2, giving a total of $\frac{32}{2} = \boxed{16}$ choices for a single sandwich with one topping.