For Nicole's database requirements, she needs to be able to look up customer names and sales prices, retrieve credit-card numbers for reimbursements, and sort items by product number.
The best response from the provided options would be:
name, credit-card number, product number, and sales price
This selection includes essential information about the customers (name and credit-card number), as well as key details relevant to the sales transactions (product number and sales price), which will allow her to sort and manage the sales effectively.