Final answer:
Mrs. Penney should use the option A) Batches to determine the amount of blueberries she will need.
Step-by-step explanation:
In order to determine the amount of blueberries Mrs. Penney will need to make her muffins without any leftovers, she should use the option A) Batches.
The amount of blueberries needed will depend on the number of batches of muffins Mrs. Penney wants to make. Each batch will require a certain amount of blueberries, so by knowing how many batches she wants to make, Mrs. Penney can calculate the total amount of blueberries needed.
For example, if each batch requires 1 cup of blueberries and Mrs. Penney wants to make 3 batches of muffins, she will need 3 cups of blueberries.