Which of the following statements about the evolution of life histories is correct?

A) Stable environments with limited resources favor r-selected populations.
B) K-selected populations are most often found in environments where density-independent factors are important regulators of population size.
C) Most populations have both r- and K-selected characteristics that vary under different environmental conditions.
D) The reproductive efforts of r-selected populations are directed at producing just a few offspring with good competitive abilities.
E) K-selected populations rarely approach carrying capacity.