Which of the following is the most common way to bias a graph?

A) by not including labels for individual data points
B) by not including labels for the axes
C) by manipulating the scale of the graph
D) by using a scale that starts from zero

C
Explanation: C) Any exercise of discretion in creating a graph is an opportunity to introduce bias, whether intentional or unintentional. The most common way that graphs are biased is by manipulating the scale.