"Experimental Designs in Which All Levels of Each Factor Occur

Multiple Choice

"Experimental designs in which all levels of each factor occur within each level of the other factor.If an experiment involves the factors age (with two levels: young and old) and sex (with two levels: male and female) , the old group will contain males and females, the young group will contain males and females, the male group will contain young and old, and the female group will contain young and old." What type of design is this a glossary definition of?

A) Complete design.
B) Multi-factor design.
C) Fully factorial design.
D) Demographic design.
E) Multivariate design.