Answer:
a. Use three dimensions whenever possible, to give the display depth
Step-by-step explanation:
The guideline for the creation of an effective graphical display includes -
1. giving a clear and concise title .
2. labeling the axis .
3. colors can be used to determine the categories .
But according to the question , the guideline not required for the creation of an effective graphical display is -
Three dimensions are generally not used in the graphical representation and can be used in case the graph needs to be defined by three parameters which may have three axis to represent the same .