Which of the Following Is False Regarding Time-Series Designs

Which of the following is false regarding time-series designs?

A) Time-series designs cannot be experimental because having control groups is not possible.
B) With a simple interrupted time series design, researchers can study one group of people over time.
C) Time series designs can be applied to studies on criminal careers over a 50-year period.
D) Simple interrupted time series design with nonequivalent comparison group is not purely experimental.