Which Example Best Illustrates Interference Competition

Which example best illustrates interference competition?

A) Soil levels of potassium are gradually reduced by the hemlocks and cedars in a climax forest.
B) The growth of starling populations usually coincides with declines in song birds since both use abandoned cavities for nesting.
C) When larger animals become scarce, wolves often prey on mice, reducing their availability to coyotes.
D) Rough-skinned newts contain enough toxin in their skin glands to kill almost any predator.