"They are visual devices that show the duration of activities in a project", the given statement regarding Gantt charts is true.
Answer: Option C
Explanation:
Charts and bars are very useful tools when it comes to project management as it can help greatly in creating a project schedule. One such tool is the Gantt chart which is a visual device or a form of bar chart which helps to depict the duration of different activities of a project.
These charts are created by using an approach that is referred to as an early start time method or approach as each task is timed to start as soon as the pre-conditions of the task are complete. This helps to calculate the delay that the contractor can afford in each task without causing an overall delay in the task.