The correct answer choice with proper 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 choice correctly uses commas in the list of items and separates clauses effectively. It also fixes the contraction "dont" to "don't" and ensures appropriate sentence structure.