Final answer:
The incorrect advantage for a business joining a cooperative is having a larger vote than smaller companies, as cooperatives operate on a democratic basis with equal voting rights for all members.
Step-by-step explanation:
The main advantage that is not associated with joining a cooperative is D. Having a larger vote than smaller companies. Cooperatives typically operate on a democratic basis where each member has one vote, regardless of the size of their business. This ensures equal say for all members, and the size of the company does not grant additional power within the cooperative's decision-making processes.
Cooperatives offer several benefits, such as A. Lower costs for purchasing supplies, as they can buy in bulk and thus obtain better rates. Similarly, B. Pooling products for better selling prices allow members to access wider markets and negotiate better terms. Additionally, C. Sharing costs for needed services further reduces expenses by distributing service-related costs among members.
Competing corporations may join a cooperative for several reasons. There is strength in numbers, and businesses often have common issues affecting an entire industry that they can more effectively address together. Moreover, they can benefit from governmental policies aimed at supporting industries as a whole rather than individual companies.