A) There be a community of species in several niche dimensions, and that a species occupying a similar position along one dimension will not tend to differ along another dimension. B) There be a community of species in several niche dimensions, and that a species occupying a similar position along one dimension will tend to differ along another dimension. C) That a species occupying a similar position along one dimension will not tend to differ along another dimension. D) There to be an isolated species that occupies a position along one niche dimension, but never differs along another dimension.