If true, which of the following would account for the average weevil depth changing to 17 centimeters in 2030?
(A) The average carrot length changed to 15 centimeters.
(B) The radishes completely disappeared from the garden.
(C) Goats arrived to eat the tops of the carrot plants above the surface.
(D) A small percentage of the weevil population died from a virus.

A small family farm has documented Tonduly carrot growth for a hundred years in a Midwest microclimate. The average lengths and masses of the carrots are shown in the table below. The same ecosystem was home to a species of vegetable weevil that attacks the carrots underground. Other than carrots, the weevils also preyed on radishes found in the ecosystem. This particular species of weevil spends its whole life beneath the soil, and the average depth at which these weevils were found each year is shown in the table below.

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Year Average carrot mass (g) Average carrot length (cm) Average weevil depth (cm) 1920 61 21.5 19.2 1930 62 21.2 E 20.2 1940 61 20.3 20.0 1950 65 19.8 19.7 1960 1970 58 61 19.0 18.7 19.3 20.3 1980 60 18.1 19.4 1990 62 17.6 20.2 2000 65 17.5 20.1 2010 61 17.9 19.8 2020 59 17.7 19.9