Here is a goal: To test baking soda to make sure it's still good.

Which way makes more sense to accomplish this goal?

Select from the following.
A). Add a teaspoon of baking soda to a 1/2 cup of hot water. If it doesn't bubble, it's time to throw it away..
B). Add a teaspoon of baking soda to a 1/2 cup of cold water. If it doesn't bubble, it's time to throw it away..
A).