Answer:
B. a Gantt chart
Step-by-step explanation:
A chart can be defined as an effective medium used for displaying data graphically or in a pictorial form.
A bar graph also known as a bar chart can be defined as the graphical representation of data (informations) by using vertical columns or rectangular bars. When a data set is observed, a bar chart can be used to graphically represent or record the total or overall amount of information contained therein.
Basically, bar charts are used for the comparison of informations obtained from a data collection by representing each value (information) with rectangular bars respectively.
Gantt chart is simply a type of bar graph (chart) that was developed or invented by Henry Gantt between 1910 and 1915. This chart is used typically by mathematicians or statisticians for the illustration of a project schedule i.e a visual or pictorial illustration of tasks that are scheduled for a specific period of time.
Generally, the tasks that are to be performed are represented on the vertical (x-axis) while the time to complete the tasks are represented by the horizontal axis (y-axis).