What is the answer and why? And why other answers are not suitable for the right answer?

Kate is the owner of PMP Construction firm, the constructions services business. Kate hires John as a salesperson, going to pay her 15 USD per hour plus 15% of the sales, so Kate and John: A) not partners, because John doesn't have decision right in the business B) Partners because John receives a share of the store's profits C) partners because John is responsible for some of the business's sales D) not partners, because John doesn't share the interest and business's profits