DoorDash is teaming up with Klarna to introduce a "buy now, pay later" option for food delivery, allowing customers to split their purchases into four interest-free payments. The partnership, announced Thursday, aims to provide consumers with greater flexibility in managing their food expenses.Klarna's installment payment service will be integrated directly into DoorDash's checkout process, making it available to users across the United States. The move comes as Klarna, the Swedish "buy now, pay...