Business Administration law question?

Lisa, Amy, and Mary are college graduates. Lisa has an idea for a new product that she believes could make the three of them very wealthy. Her idea is to manufacture beer dispensers for home use. her goal is to market them to consumers throughout the Midwest. Lisa's personal experience qualifies her to be both first line supervisor and general manager of the new firm. Amy is a born salesperson. Mary has little interest in sales or management, but would like to invest a large sum of money that she has inherited from her aunt. Based on this information, which form of business organization should Lisa, Amy, and Mary consider adopting?