Some Populations of Animals Exhibit Periodic Behavior Over Time

Multiple Choice

Some populations of animals exhibit periodic behavior over time. During the 1960s and 1970s, two scientists carefully studied the population of the Carabid beetle in a region of the Netherlands. Assume that the table below shows the results from their study. Renumber the input data as years since 1965. Using only the data, estimate the horizontal shift, where a shift of zero corresponds to the year 1964. Round your answer to the nearest year.

A) 4 years
B) 34 years
C) 7 years
D) 5 years
E) 3 years