In state governments, which entity is responsible for voter registration?

The major difference between the hypothesis-testing procedures in factorial versus single-variable designs is that

A) single-variable designs, although less complicated in terms of design, are more difficult to interpret. B) there are more dependent variables in the factorial design. C) the reasoning is very different in each type of design. D) there is more chance for confounding to occur in factorial designs.

Which of these time periods was the most peaceable era?

a. The early 1300s b. The mid 1500s c. The end of the 1800s d. The second half of the 1900s