What two materials does Chris Ware use before adding color when creating his artwork?
Oil pastel and black ink
Chalk and watercolor
Colored pencil and pen
Photo-blue pencil and black ink

Chris Ware uses - the following
A - oil and black ink
D- photo- blue pencil and black ink

The correct answer for this question is that a statement that can be proven by observation or measurement is known as a fact. The other possible answers here simply refer to idea that different individuals can place value on, but that are not necessarily known to be true.