Which of the Following Is Not a Characteristic of a Two-Factor

Which of the following is not a characteristic of a two-factor random effects ANOVA?

A) Two factors (or independent variables) each with two or more levels
B) The levels for one of the factors are randomly sampled from the population of levels (i.e., the random-effects factor) and all of the levels of interest for the second factor are included in the design (i.e., the fixed-effects factor)
C) Subjects are randomly selected and assigned to one category of one independent variable only
D) The dependent variable is measured at least at the interval level