Refer to the figure.
Due to conservation efforts, this population of Seychelles warblers increased from 1959 to 1990. How does the relationship between the number of birds and number of territories change over this period?

A) The number of birds and number of territories increase at the same steady rate as one another over time.
B) The number of birds and number of territories increase together at first, but the number of birds then begins to greatly outnumber the number of territories.
C) The number of birds consistently outnumbers the number of territories throughout the period, but at different amounts in different years.
D) The number of birds increases steadily throughout the period, while the number of territories oscillates.