In this situation, it's important to consider the well-being of your toddler and promote a safe learning environment. Let's evaluate the courses of action:

I. Yell at them to be more careful with things made out of glass.

This course of action involves raising your voice at the toddler. While it may express your frustration, it's not a constructive way to handle the situation, especially if the child's action was a genuine accident. It may lead to fear and anxiety in the child.

II. Punish them to make sure they remember to be extra careful next time.

- Punishing a toddler for a genuine accident is generally not recommended. It can create fear and stress, and it's not an effective way to teach them about accidents and safety. It's important to remember that toddlers are still learning and exploring their environment.

Given the context of the situation, the better course of action is to:

D. Neither I nor II