Final answer:
The best tool to display the number of students in each business discipline is a histogram since it effectively represents the frequency distribution of categorical data, showing which business majors are most common.
Step-by-step explanation:
The best TQM (Total Quality Management) tool for displaying the number of students majoring in each business discipline would be a histogram. A histogram is used to graphically summarize and display the distribution of a process data set. It is ideal for representing the frequency of occurrence of different categories of data - in this case, the number of students in each business major.
This makes it easy to see which majors are the most popular and how they are distributed across the student body.
Other options, such as a cause-and-effect diagram and a scatter diagram, are more suited for illustrating relationships or correlations between variables, while a flowchart is designed for narrating the steps in a process. The histogram, therefore, stands out as the most appropriate choice for the student's needs.
A histogram is a graphical representation of data that organizes numerical data into intervals or bins, and displays the frequency or number of data points that fall into each bin.
In this case, the histogram would show the different business disciplines as the bins, with the number of students majoring in each discipline represented by the frequency.
Therefore answer is A.cause-and-effect diagram.