In this question, only motorcycles with 8 license plates are selected for inspection, and the probability of each possible sample being selected is unequal and wrong.
B. The lottery method is a method of numbering each unit of the survey population first, and then randomly selecting numbers until enough samples are drawn. It is suitable for transactions with relatively large overall capacity.
It is wrong to choose a motorcycle with license plate number 8 at random, which is inconsistent with this question.
C systematic sampling: a sampling method in which all units in the population are arranged in a certain order, the sampling interval is determined according to the sample size requirements, and then the starting point is randomly determined, and one unit is sampled at regular intervals.
C is misleading. It seems that extracting a motorcycle with license plate number 8 from every nine cars meets the requirements. However, the license plate is not according to 1, 2, 3, 4, 5, ... and all motorcycles with different single digits are different. For a simple example, the number 8 is lucky, and the number 4 is not very popular, so there are more motorcycles with the tail number 8 than those with the tail number 4. Unequal interval, C error.