Ingrid is a programmer at an online travel agency headquartered in Berlin. After a recent trip to Paris, she recognized an untapped opportunity to develop a short-term vehicle rental service on behalf of her employer. She shared her idea for the new service with several colleagues, and they've now formed a group to explore and develop this concept. Ingrid will take the lead on organizing the group's efforts. Based on this information, which type of structure is Ingrid's organization using