Final answer:
If you pick either an orange or apple and pretzels or carrots to go with your sandwich, you have 4 choices for your lunch.
Step-by-step explanation:
If you pick either an orange or apple, you have 2 choices for your fruit. If you pick either pretzels or carrots, you have 2 choices for your side. To find the total number of choices for your lunch, you multiply the number of choices for each category. So, there are 2 choices for the fruit and 2 choices for the side, giving you a total of 4 choices for your lunch.