Leo and Josh have a welding business organized as a general partnership. A customer comes into the business seeking a welding contract. Leo agrees to do the work for the customer as a separate project from his business with Josh. Which of the following is true?
a. Leo may make a separate contract with the customer as long as the customer doesn't already have a contract with the business itself.
b. Leo cannot contract with the customer unless the customer has had previous business dealings with Leo.
c. Leo has usurped the concept of joint ownership of the business.
d. Leo is free to make contracts separate from his business with Josh.