This situation describes a heuristic task (D). The ITIL 4 Specialist: Create, Deliver and Support guide (Section
3.3.3) explains: "Heuristic tasks require creative problem-solving and judgment, often encountered in complex service restoration scenarios where predefined solutions are insufficient." The need for creativity in restoring the payment app fits this definition, contrasting with algorithmic tasks (C) that follow set procedures. Option A (cooperation) and B (servant leadership) are enablers but not the task type. The guide adds: "Heuristic tasks are common in incident and problem management, necessitating skilled intervention." Reference: ITIL 4 Specialist: Create, Deliver and Support, Section 3.3.3 - Task Types in Service Management.