In a randomized block design of ANOVA, how many factors are there to be analyzed?

A) one factor
B) two factors
C) three factors
D) four or more factors
E) all of these

In a randomized block design of ANOVA, there are two factors to be analyzed - the treatment factor and the blocking factor. The treatment factor represents the different treatments or levels being compared, while the blocking factor represents the different blocks or groups used to control for potential confounding variables.