In Color Use, an Appropriate Way to Combine Color Is

In color use, an appropriate way to combine color is:

A) If users need to identify what information is colored in a particular color, then the number of colors should be no less than 11;
B) While choosing color, it is best to use the colors that are close to the center of the color wheel;
C) For drawing attention, combining colors that are high on both saturation and brightness are most effective;
D) When colors are used to signal an ordinal relation between data items, it should avoid using the spectral sequence;
E) To avoid the eye strain of users caused by high contrast, it is not recommended to use colors that are close to each other on the circumference of color wheel.