Which of the following statements is INCORRECT?
a. The most common way to determine the size of a population is to count or estimate the number of individuals in a number of samples.
b. A transect consists of a long triangle and a line of a certain length. The occurrence of any individual within a certain distance of the line is recorded.
c. Ecologists tend to use quadrats to sample a stationary population.
d. The density of a population is determined by determining the size of the quadrat and then dividing this by the average number of individuals in the quadrat.