Which of the following is a method of displaying the timelines of all the various subtasks that are involved in any project?

A pie chart displays proportional data as segments of a circle to show percentage breakdowns, and has no capability to represent task timelines or sequences.

A scatter chart plots individual data points across two axes to reveal correlations or distributions between variables, not project task durations or ordering.

An activity network diagram (also called a PERT chart or precedence diagram) visually represents all project subtasks, their estimated durations, and sequential dependencies across a timeline. It allows project managers to trace the flow of work from start to finish and identify the critical path. This makes it the appropriate tool when the goal is to display the timelines of all subtasks involved in a project.

A cost-benefit analysis is a financial evaluation technique used to weigh the projected costs against expected benefits of a decision, not a scheduling or timeline visualization tool.