A scientist observes a flock of ducks swimming in a pond,
distributed as shown in the image.
He observes similar arrangements of ducks in several
other ponds and lakes within the county.
Which option best describes the patterns of distribution observed by the
scientist?

A. Clustered pattern on a pond, regular pattern in a county

B. Regular pattern on a pond; clustered pattern in a county

C. Random pattern on a pond, regular pattern in a county

D. Clustered pattern on a pond, random pattern in a county