Which of the following best describes the fish population in the year 1958?
(A) All medium-orange in color
(B) Mostly medium-orange fish with some nearly white and some nearly brown
(C) Mostly white fish and brown fish with a few orange fish
(D) Equal numbers of orange fish, white fish, and brown fish

A population of goldfish in a large, isolated pond were studied in 1958 and again in 2008. The fishes' pigment level varied from pale white-orange fish to dark brown orange fish. The color of each of the fish was recorded in the figure below.

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Number of Fish 1958 Goldfish Phenotype Distribution Light pigment Dark pigment