Final answer:
The correct answer is option d. The delivering phase of the project life cycle typically has the highest cost implication should a negative risk event occur due to the concentrated deployment of resources and the advanced state of project implementation.
Step-by-step explanation:
When considering the project life cycle, different phases have varying levels of expenditure and risk associated with them. During the scope development phase, the foundation and objectives of the project are established, but major costs are not typically incurred. In the defining phase, more detailed project requirements and goals are laid out, and while more resources start to get involved, the costs due to risks are still relatively controlled.
The planning phase involves creating detailed schedules, budgets, resource plans, and risk management plans. It is a critical stage; however, the cost of risks occurring is still not at its peak compared to other phases. In the delivering phase, also known as the execution or implementation phase, the project's plans are put into action. This is when the project incurs the bulk of its expenses, including labor, materials, and other resources.
A negative risk event occurring during the delivering phase would likely have a much more significant impact because the resources are fully deployed, and project components are being constructed or implemented. Any delays, rework, or major changes required due to an unforeseen risk event could drastically increase costs. Therefore, the answer is (d) delivering, as this phase typically has the highest cost implication should a negative risk event occur, primarily because of the concentrated deployment of resources and the advanced state of project implementation.