Creating open innovation in a company can be exciting and challenging. Based on our readings and class discussions, which is of the following actions can be used to sustain employee enagement and idea submissions over a longer period of time? A. Setting up special internal team versus external team competition events. B. Setting up special events accompanied by recognition, promotions and rewards. C. Setting up a special internal "Innovation Council" composed of senior executives to manage global open innovation. D. Setting a long-term calendar identifying and describing the types of innovation ideas the organization is seeking along with the specific dates for submitting ideas