Which of the Following Statements Is True

Which of the following statements is true?

A) Never use zero where the horizontal and vertical axes meet on a graph.
B) The relationship between two variables is never easily represented in a graph.
C) It is impossible to look at a graph and determine whether two variables are directly or inversely related.
D) The appearance of the relationship between two variables on a graph can be altered by changing the numbering on the graph's axes.