Which of the Following Statements Is Not True About a Systematic

Which of the following statements is not true about a systematic sampling plan?

A) Systematic sampling works best when objects are received in sequence during a specific time period and the characteristic of interest can be reasonably assumed to be randomly mixed
During the time period in which the data will be collected.
B) A systematic sampling plan is often used for exit polls and quality control studies.
C) With systematic sampling, objects from the population are sampled at regular intervals.
D) All of these statements are true for a systematic sampling plan.