The answer choice that uses correct punctuation for the passage is:
When I go to the grocery store, I always make sure to buy bananas, apples, and oranges. It's important to have a shopping list so I don't forget anything I need. I also like to avoid busy hours; you know, when everyone else is shopping.
This option correctly uses commas to separate items in a list, avoids unnecessary colons, and properly punctuates the sentences. It also correctly uses "don't" instead of "dont."