Q: In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.
Every week I go to the store to stock up on groceries for my family.  First, I make a plan for the meals I want to make during the week.  Then, I look through the cupboards and refrigerator and freezer to see what I already have.  If I need something to make a meal and I don't have it already on hand, I put it on my list.  After I do this, I then check my pantry for staples.  I like to always have certain things on hand like ketchup or vegetable oil.  I also check to make sure we don't need any paper products like toilet paper or paper towel.  If I find anything that we need, it goes on the list.  Once my list is complete, I get in the car and drive to the store.  I make sure to mark off each item as I put it in the cart so I don't miss anything. 
Question: Why were they going shop?
A:
They needed things from the grocery store.