Which of the following options contain only things that should be avoided in a data visualization?

a.

Overplotting, color for continuous variables, different axes on side-by-side plots.

b.

Overplotting, color for categorical variables, same axes on side-by-side plots.

c.

Overplotting, color for categorical variables, different axes on side-by-side plots.

d.

Overplotting, color for continuous variables, same axes on side-by-side plots.