Final answer:
The systems selection process is initiated by both logical specifications and physical requirements, making option C the correct answer.
Step-by-step explanation:
The systems selection process is typically triggered by both logical specifications and physical requirements. Therefore, the answer to the question is C. both a and b. Logical specifications refer to the system functionalities and features that support business processes and requirements. Physical requirements pertain to the actual hardware and infrastructure needed to implement and support the system. Both are essential for determining the appropriate system to fulfill an organization's needs.