What is a difference between a process innovation and product innovation? A$)$ A process innovation is a new business plan, whereas a product innovation is a new or improved good or service. B$)$ A process innovation is a new recipe or formulation $,$ whereas a product innovation is a new or changed idea that reduces carbon footprint. C$)$ A process innovation is a better way of doing things, whereas a product innovation is a new way for firms to make money. D$)$ A process innovation is a better way of doing things, whereas a product innovation is a new or improved good or service.