As part of an investigation of the population of foxes on San Miguel Island, a scientist graphed the number of foxes present on the island over a span of 15 years, as shown below. The study began with year 0 and ran until the start of year 15. According to the graph, during which year did an event reduce the carrying capacity of the area?

A.
year 3

B.
year 6

C.
year 10

D.
year 11